Exciting film that ties in lots of elements from the previous ones...

*Minor Spoilers* (Though I've tried to be vague on the detail...)

The villain gives a long monologue about the 'rich elite' who control everyone and use people as pawns... But given that he's the villain, there's no real merit to his rant.
There's a clearly virus enhanced woman whose fighting skills are more than equal to the protagonists (except that it's never stated that she is enhanced)...
Overall, the guys and the gals all take a part in fighting, rescuing and saving each other as a good team should.
RE:DI is a fun movie that allows each of the main RE heroes to shine. It is great being able to see Leon, Jill, Chris, Claire and Rebecca all in on the action. (Rebecca is the one who has the least screen time, but she plays an important role nonetheless).