I got my PS3 just over a month ago, and I gotta say it IS the best Blu Ray player ive seen. I mainly got it for that reason, however, Killzone 2 which was bundled with it proved to be quite a decent game after the first few levels, and the multiplayer for it is good too.
However, Warhawk is a blast. I havent had this much fun in Multiplayer since Halo 2 back on the original Xbox. Its difficult but the fact your flying around in giant airships blowing anything and anyone up is just too much fun to pass up. I highly recommend it.
I also picked up Fallout 3 for it for £20 a couple of weeks ago, and soon became addicted to it, and completed it fairly quickly. Only to find out that A) The main quest ends and THATS IT. and B)The DLC which lets you play beyond the Main Quest ISNT COMING TO PS3 :@:@:@:@
As you can tell, that reallllly pissed me off when I heard it.
Aside from that gripe, I got to say my experience of the PS3 is overwhelmingly positive, aside from the annoying Internet Setup (Seriously, why cant you save profiles on it when you switch from wired to wireless??).