"Installed the XTB-IIR last night. All I can say is: WOW what a difference. I removed my Signalinc Coupler Repeater & 3 BoosterLincs in my 2200 SF house. Previously mapped, measured, & corrected house. Filtered all offending devices except installed CFL,s. For the most part compensated marginal signal issues with double or triple commands in AHP macros. On some circuits signal strength on ESM1 is showing 5V plus, the furthest point from the panel is showing 1.5V. I'm sure if I look further in those circuits (CFL noise)I could improve signal strength further."

"I want to give you TWO THUMBS UP for providing me with the XTB-IIR, I am not knowledgeable in what goes on in the powerline, but obviously you are!! I'm just glad I found your product. It has giving my system the core piece of the puzzle and is performing flawlessly. I know there are other factors in making a reliable system but anyone attempting to automate their home should start with the heart of the system the XTB-IIR."

" I'm running an Ocelot (plugged into XTB-IIR TW523 port) with HomeSeer and I have never have had a missed X10 command. X10 system at this point is 100% reliable (until the XTB-IIR though, this was impossible). A lot of people have a hard time believing me when I say my X10 system is reliable as UPB. I think if others would take the plunge and install the XTB-IIR they would be just as amazed as I am. I am extremely happy and do not have any plans to change to a different technology (Insteon, Z-Wave, UPB etc. etc.). Jeff; thank you for creating and providing such an extremely well performing and extremely reliable product. Truly the key to a sound X10 network."

"I've had my updated XTB-II installed now for a few days & I thought I'd give a little feedback. First, it's performance is terrific. I had expected better reliability, but did not expect it to be noticeably faster in response time. I didn't realize how many cycles where eaten up by re-transmits, etc. Everything in the house works as expected now. I can even count on dims to work predictably - something that was always elusive in the past."

"Received the XTB-II on Friday and got it installed this weekend. Removed all of my other amps/ couplers/ repeaters as well as my CM15 (I was running multiple powerline interfaces. Plugged my LynX-Port into the 523 port and restarted everything. So far, every device in the house has been working perfectly. I will keep watch and hopefully this will be the fix!"

"My house is working perfect, it's a shame all the folks who keep bashing x-10 can't enjoy the same satisfaction and reliability that I am now experiencing."

"It has arrived. Made it up in a couple of hours this afternoon and it worked first time. Instructions were clear and simple and it was pretty easy to make although I confess I had to go to the web to remember resistor colors!!! The best news of all is that there is now nowhere in my house where I can t get at least a 50mv signal so basically everything responds first time. Does not appear to be interfering with my Netgear 200mb Powerline ethernet either which I was worried it might. All in all - the best X10 product I have bought in a long time. I cannot tell you how many crappy repeaters and other things I have tried to get over the wiring in my house and the XTB-II solved it straight away. Best of luck selling the UK version."

"I got your very nicely designed XTB kit today and assembled it this afternoon. It solved all problems with weak signals in some areas of my house. Everything is now working perfect. Thanks for developing this excellent signal booster."

"OK, I finished the kit, and I am thrilled. You've given me back my X10 system! I had grown dismayed over all the missed commands that were leaving night lights on all day, and the phantom commands that would turn things on/off at whim. I have yet to permanently install my XTB-IIR, but connected across a single phase of the power line, via a line cord, I've been able to remove my Leviton repeater module, and everything still works flawlessly (I do have a passive coupler installed, which will come out when I do my final installation). My system includes two separate buildings, some 130 ft apart (electrically), a main distribution panel on the exterior of the house, and two separate sub-panels, one in the house, and the other in the out-building. I have always experienced problems transmitting commands to the far corners of the out-building, and even the repeater I had installed didn't correct the problem reliably. With your booster, I've been able to transmit commands to every corner of the two buildings, and I have yet to see any spurious commands come through. (My controller is the JDS Time Commander Plus.) Thanks again for designing a really great product, and making it available at a reasonable price!"

"Just built it. Worked right away and my Insteon problems are history! Great kit. Every bit as well done as a Heathkit. Better in some ways."

"Just a quick e-mail just to let you know that everything is still working great, I really can say I've not had a single day when it has not worked, I'm just so pleased with the XTB-II and how it transformed my set up. Just incase you don't remember me, I'm the guy in the UK who's X10 just would not work. Once again Jeff, thanks for your great invention."

"The XTB-II has arrived and I have fitted it. It is running with a CM12U computer interface and an SC9000 telephone transponder for telephone control. Both of these units are now controlling devices that had previously been unreliable or completely unreachable, including a plug in appliance module at the far end of a long extension lead out in my garage. I did a direct comparison between original and XTB-II boosted and the difference was marked and immediate. Take the XTB-II out of line and the devices revert to previous behaviour.

It arrived well packaged and on opening, the quality of design and construction are evident, an excellent product which is a real enabler for an extensive and reliable X10 set up. Please feel free to post my comments on your web site. I wish you continued success in the future."

The unit arrived today, and is installed and working perfectly. My signal guzzling TV is at last defeated! Thank you very much, I was about to give up on X10.

"Just powered it up to try. Brilliant, works first time and I even had a set of garden lights powered from an outbuilding that only work with a transmitter connected locally and other 'garage' devices unplugged. Worked first time too without making any allowances. My next step at some point will be to develop an interface to connect directly to the digital port rather than use the CM11U unit which adds upto 2 seconds delay. Many thanks Jeff, a superb product very well developed and extremely well supported with the web site. Some larger manufacturers should take notice of your style."

"I left the CM11A/XTB combination plugged into the original outlet for well over a week, with the dying BoosterLinc 4827 unplugged, as it wasn't doing much good anymore. I left a phase coupler plugged into the dryer outlet. Everything worked perfectly. I then moved the CM11A/XTB to an outlet more convenient to the computer. This outlet is feeding a PC, router, modem, printer, scanner, monitors, etc. etc. plus a TV and many VCRs and DVD recorders, as well as a stereo receiver. Needless to say the CM11A had never been happy on this circuit! It has worked very well for two weeks in this outlet. It missed one 'ON' operation, but I am pretty sure the printer was working at that moment. I'll have to watch for that. But what a relief. Here I am, reprogramming the CM11A over several days for the year's timer operations (dratted DST change ...) and for the first time ever I can just leave it plugged into the adjacent PC. Thank you very much for designing and making this wonder box."

Thanks so much for your reply. Also, thank you for the high resolution photograph of the XTB-IIR. That has given me the confidence to order one as soon as I am done building the XTB. I also just wanted to re-iterate that I feel that the quality of your kit and their design exceeds that of most commercial products. I hope you continue to design and sell X10 (or home automation in general) related kits/products."

"I just finished assembling and installing your XTB kit and wanted to let you know that it assembled and is functioning flawlessly. Thanks very much for making this available; it seems to have solved all of my X-10 woes."

"I have quite a bit of experience with SMD components so the op-amp was not really a problem. It is a good idea to use really fine solder and a very fine tip on the soldering iron. The installation of the rest of the components was not a problem."

"The instructions were clear enough to get it done right the first time."

"Fired right up and worked as advertised."

"If you do not have signification experience assembling these type of kits, I suggest that you buy the assembled version or let and experienced kit builder do it for you." Very good advice!

eBay 03/06/07: Holy smokes!!!! anyone that uses X10 needs one of these…

eBay 02/01/07: WONDERFUL !!!!!!!!!!!!!!!! What a great product .. Refreshing engineering

eBay 01/08/07: Awesome X10 Booster! Very responsive to emails & great service.

eBay 11/26/06: Works Great. Would buy again.

eBay 10/31/06: Wow, what a X-10 product!!!

eBay 10/09/06: Great kit. Works great. Would buy again.

eBay 09/24/06: Looks like a quality product and extremely fast service....

eBay 08/31/06: Good quality, easy to put together and IT WORKS WONDERS for X10!