For a zombie flick that was a sequel to a movie based on a video game (there's three strikes against it already!), it was pretty good. it wasn't *great* by any means (although it was nice to see Jill Valentine, and other characters from the game in flesh), but it was certainly better than it had any right to be.
now granted i'm a zombie fan, so i might be biased.
i'm also a mila jovovitch fan (hell, i've got her album... and it's actually pretty good!), so i may be biased there too. it's nice to know that you can always count on mila to put in a nude scene. one of my favorite action babes.
of course, i'm also a RE fan. i have the first movie on DVD and almost all of the RE games.
I haven't seen Sean of the Dead yet, but it's on my to do list (which has been superceded by GTA san andreas for the forseeable future, lol)