Obviously got one of these with the Premium 360 pack and was so impressed that I had to purchase a second one along with two official play and charge kits.
Before using the controller I was dubious about the wireless aspect and in game lag having already used wireless mouses and keyboards and been generally unimpressed by the precision ingame.
Microsoft got this product spot on though, I was amazed at the battery life with a week and a half passed and the batteries still shown as going strong in the Xbox dashboard, add to that the easy setup, slick response in game plus the Xbox button which can act as a remote power on button for your console and a quick way to view your achievements during a game.
All of the above paired with the excellent understated design make this controller easily stand out from the rest but the fact that it also works excellently on PC's make purchasing one or two a no brainer.
I also see that Microsoft have started selling retail packages which include the wireless pad and Crossfire Reciever plus the RRP seems to be around the same price as Play.com is currently asking for their standalone wireless 360 pad. I haven't checked Play.com's PC section recently so haven't had the chance to see if they've also started selling these bundles but do yourself a favour and wait for them to start doing so then pay the extra few quid for the bundle rather than buying both the controller and crossfire reciever seperately which would cost around £10-15 more.