My mate has and he said it's very good.
It's nice and quiet and he particularly likes the touch sensitve buttons on the xbox itself for eject or turning it on lol.
But it's got the same hardware specs as the old xbox 360, apart from a few more USBs, Kinect ready port and no memory units (as it has been replaced with USB storage)
Hard Drive is very big too. 250GB which is a bonus, and it is the same price as the original Xbox 360.
The two main points though is
- Smaller, slimmer
- Quieter!