The volume rocker would get set off even when you push on the side of the case beneath the rocker. I fixed it by giving the volume rocker on the case a good strong wiggle to loosen it up so it didnt get set off by the case itself.
I just set up my HT8200 with my 55 inch D8000 TV. I have wall mounted both, and it works nicely. I like the sound it produces. The only reason I dont give it 5/5 is that it doesn't quite match the colour silver bezel of the D8000 TV. It looks like it is more suited to a black TV.