The only complaint I have regarding it is that some of the facial expressions and lip syncing are off somewhat, but it hardly detracts from the overall movie as much as some other issues I mentioned.
So overall, for a 90-minute, straight-to-DVD release, I really enjoyed it. It had a well-written plot that left plenty of openings for a sequel (or possibly to segue into RE5?), engaging action sequences, and great animation and voice acting, but some of the characterization and pacing holds it back from being anything other than an interesting addition to the Resident Evil mythology.
7.5/10 - I highly recommend fans of the series to check it out, but if you arenít familiar with the backstory to begin with, this isnít really the best place to start.