Love em. Going from just a TV to turtle beaches allows you hear things you've never heard before. And they are amazing for netflix and allows you to hear music (Last.FM, etc) the way it was intended.
I upgraded from what ever the base model turtle beaches where( the wired kind) and havent looked back since. A new pair of batteries should last...oh, i dont know, 18-24 hrs of play. Its hard to keep track of time when your wasting time. Its easy to burn up the batteries when you turn off the xbox and pull off your x41s with out turning the head seat off it self.