I never used this system but I did help a friend fit a system, which name escapes me from the internet wholesalers TLC biggest rival...............and all I can say was that in the end we did a conventional loop system.
When we cut out the back boxes and fitted them into position, we started to fit the ariel into the switches nothing worked so we called the tech department of the company, to be told that we had to now knockout out of the back box and make sure the ariel part was outside the metal box, so that we did took another half a day to do all the boxes.
The upstairs lights were quite successful to be honest. We placed the receiver in the loft and it started to read the switches ok. then the 2 way light for the stairs no chance. Another call to be told that did we have the small ariel on the receiver outside the unit .....yes we did ............ahhhh may need a booster ariel that they will send to us overnight .......................... finally arrived and fitted and they worked.
Downstairs was a nightmare. The receiver was sited in the basement under with the CU and main header. It would read nothing, nothing would work even with a booster ariel, finally the tech department said it may not work in a brick basement unless you could get "line of sight", at that my mate ripped them out. and we spent another 3 days doing conventional drops.
This was 3 years ago and they may be better, but until someone tells me different then fool me once shame on you, fool me twice shame on me.
