I'll be picking it up, though I don't expect much from the story line myself. The online co-cop play looks like it could be fun.
The demo that I played for it though was entertaining. I have one of the top 3 high scores on the Echo they have open for play on there on my XBL friend list.
I'm mainly more eager for the Gears of War 3 online beta that comes in the Epic Edition for the 360.
For the Australian's out there; Good Game is doing a review on Bulletstorm this Tuesday 8:30pm on ABC2 (they've moved to Tuesdays now, I keep forgetting >.<). If you're not Australian and want to watch the episode I'm pretty sure you'll be able to access it on iView (after Tuesday, obviously).