First impressions -
Really great gaming experience and play. HALO 3 is dang cool - accept going online is a bit annoying as it seems to be youngin's talkin trash about my mother and stuff. This was immediately followed by some serious p0wning, although admittedly I'm rusty.
MLB 2K8 is amazing, but the control is very hard. Swing is complicated, but I'll get used to it (requires multiple trigger actions). I downloaded a bunch of other demos, very cool stuff.
I'm very happy with the purchase, worth every penny IMO. I did think the game was a bit loud though when you are playing and a disc is in the tray. Other than that, which is easy to drown out with high gaming volume, I loved it.