I've been using this about a year already with no complaints. Worth the extra $$$ for a selector with volume control since - as is my case - not all speaker pairs have of the same quality and have different volume levels otherwise. So - with my #1 zone at 50% volume, zone #2 at 75% volume, and zone #3 at 100% volume I have comfortable and equal listening levels in all zones (then i just use the receiver volume to adjust all at once and keep them equal).
good buy. no idea if as previous reviewer says i might be doing damage to my receiver, but since in my case i paid less for the stereo receiver than i did for the speaker selector, i suppose it's a risk i'm willing to take. besides, over a year into it, i've had no problems.