The only issue I've had is that their WPC driver board causes the WH2O topper lights to stop chasing. I bought a new and improved version from RD but the problem persisted.
After contacting Jim, it was determined that one of the reisistors was still wrong.
I was waitign around for a replacement, but my buddy happened to have the necessary resistor and I fixed it. Works fine now.
My only other beef is that they make the connectors so tight. Pulling connectors off an RD board can be a chore.
Aside from that, great products. I've used several.