Bought a set of these a few months back to use with my 360. They were great for sound but the quality of the chat was pretty poor. I could not even recognize my own brothers voice and the the fact the mic has no mute option was annoying as well. I sold them on ebay and got nearly all my money back
Trying out some Turtle Beach Ear Force X1's at the moment chat quality is a lot better and there's no need to plug them into the mains, although they are hurting my ears already after only a few hours use. I'll give them a little while to break in before firing them on ebay as well