Firstly, I got these from GAME but you get the same headset, so I can't comment on delivery ect, I can talk about quality, ease of use so on.
Secondly, When I got these and tried them I was disappointed, On PC they sounded crap and on Xbox they didn't work.
The PC problem was my USB was the slightly broken one, and the Xbox problem was my Tv, not the headset.
After a long wait, (and some swearing) I got it to work on my laptop, (proving it was the faulty USB) and using it perfectly on a different Tv for Xbox, and ever since I've loved using them :)
-I can finally talk to others on xbl/PC and they can hear my voice, no white noise ect.
-I can play Xbox with the Tv sound off, and hear everything (and I mean, everything) through the headset alone, and thus replaced my 7.1 Surround-sound, yes ! They're that good.
My only complaint is the fittings, which is subjective to each and every person.
Because although you can adjust the height of the ear-cups, you can not do the same for the crown of your head, although after stretching them, they fit like a glove.
With these you can hear the enemy footsteps, and they're weapons reloading.
But they won't hear you.
Unless they have a pair too.