Only got about 20-30 minutes to play during lunch, but even on my now-aging 5850, this game is stunning. Super smooth, super fluid. The music, environmental and sound effects are all outstanding.
When I first loaded it up, the controller help window showed that "A" was confirm and "B" was back, but in the config I was set to "JP Standard" with the two buttons reversed and had to change that to "Global Standard" to get it set back correctly. It was a bit confusing at first but not difficult to resolve.