Its not bad once you get the base system set up. I also run lighting and other things through the system. X10 is not too bad on the wallet as well. I controle the pool, deck lights, bathroom lights, air cleaners, etc. etc. through the system. I have droped around $200 in the system so far and will end up with about $450 by the end of the year. System took me about 30 to 40 minutes set up to get it running and about 2 hours to replace all my wall switches.
Steve