Agreed, it's a lot of fun. I picked up BF1942 a week or two before UT2k3 and I haven't touched BF1942 since. Too bad it's past the return date.
UT2k3 really
is a lot like UT, obviously, so it's a good bet that if you liked the first you'll probably like this one. But a bunch of the reviews have also hit on another good point, and that's that the game's a lot like Q3, also. So the Q3 people might be surprised by the game as well.
m19