I've been using this device for about a month playing COD5 and using Skype and have concluded the following:
Audio is excellent and unless you have ears like an elephant they fit on just nicely. They might be uncomfortable after a while but if they do then you've been playing for too long so unplug you geek and get some fresh air and some sun rays.
The battery life is also very good considering the size of the headset, you can get at least 3-4 hours providing you haven't got the volume up full max all the time.
The quality of the mic is as good as just about another device out there.
Overall this is good value for money, easy to install and use and have great range - about 20 meters but could be more if there is clear line of sight.
Hope this helps.