I recently purchased the Rocketfish wireless kit, and I realize I am late to this party, but I wanted to let everyone know that they work great! I have my receiver unit under my couch and about 20 feet from the transmitter. No glitches and no problems. I did manually set my audio delay to the surrounds to about 15ms, and that prevents any echo effect. I will set up the system using my Denon's Audessy autosetup. Just wanted to let others know that this is a very viable option.