Runs well at 1280x1024 here with all the details maxed. XP 2000+ with a GF4 Ti4600 running WinXP. Slight overclock.
The details are really nice. It's like finally getting to play in the environments you see in benchmarks. The shadows from the tree leaves and branches were impressive as well as the grass. Actually, it's just nice to have an interesting environment. Okay, back to checking it out...
Anyway, just my 2 cents.