Very precise positioning with the right tuning, if you use X-Fi you can hear enemies at incredible precision, and literally hear them creeping up on you. Microphone is very good indeed, if you make teamwork and mic. comms a priority. Stylish, and on the face of it, nice strap, microphone and headset comfortable (imo.) Bass not outstanding, and the treble can be a little unrealistic with some sibilence but with tuning it is acceptable.
Weak soldering, tendency to develop dry joints. The "FULLY" enclosed headphones can be off-putting at the start as you will only be able to hear yourself talking -very- muffled, but in a noisy environment like a LAN party this can help your concentration, and so long as you adjust your mic so you can hear your voice transmitted in your headset you can get used to it.
Try before you buy to see if the encloses nature of the headphones is a big plus or a big minus.