I have written up my review of ZWave before. It is a wireless messed type home control system that allow easy retrofiting of lighting and appliance controls in a home. It also works great in condo and apartment buildings because commercial wiring does not work well with powerline systems like X10 and UPB. This year since I put up some holiday lights on our balcony, I took the opportunity to order a few more controllers and an outdoor appliance control for the lights. Now we have a wireless keypad almost everywhere in the loft!