They are extremely expensive. Spent 18k for 40 dimmers, some shelf lighting and new recessed lights. Sent first guy out for this big job and he was clueless. They are messy while they work, and I had to clean up everyday as the day went along as they prefer to wait until the end of day so dust and trash is sitting on floor through out the day. They charge you a membership fee too. I won't recommend them but since I'm a "member" and under warranty I will have to use them for awhile. After that no way!