I echo what iLog said. It doesn't have much effect in rooms with padded furniture and carpet. Its changes were barely noticeable there, and not really an improvement or otherwise to me. However, if you have a boomy/reverby room like a bathroom, it makes some pretty drastic changes. In my experiences, those changes made it a lot worse than I already had it set up. It killed most of the bass and a fair amount of the treble and just left it muddy. Hopefully they continue to tweak it.