I've heard nothing but good reviews for powermat.com, but my personal experience with the place was really bad. I filled out the web form to get his recommendation for panels for my system, and I quickly got a rambling, somewhat incoherent reply that he had already talked to my wife (he hadn't) and that he was having to pay people to "read the web site" and answer the phones because so many people were asking for information (I was ready to buy panels). He then recommended enough panels to cover the area I described to him in panels 4 deep. The guy was a real jerk, and I won't be buying anything from him.