I've just seen it. It's indeed amazing.
There's a lot of fan-service in the movie, you can recognize some RE4 scenes in different context such as Ada's fight scene, Leon wearing his RE4 suit etc. But that's good I think, because it shows that the creators wanted to please their audience.
The animations also improved a LOT since Degeneration, the fight scenes look really spectacular. However the talking animations, especially Svetlana's and Ada's could have been better, sometimes it looks like they are talking with closed mouth.
Also like the idea that they brought back more B.O.W.-s for the film, including Lickers and Tyrants. I think that's what have been missing in the first movie, where there was only a G-mutation and zombies.
What I didn't like in the movie, is that there's some scenes that don't make sense. (See below as high-lighted text since some of them contain spoilers)
-Buddy used the Master Plaga on himself, so he could control the Lickers. Master Plaga supposed to control Ganados/Majini. How could it control Lickers, if they are from different viruses: Plaga <----> T-virus/Progenitor virus?
-The Tyrant killed the Lickers with one blow. But when Leon got punched by 'Mr X', he flew like 20 meters and hit a building's pillar, which would practicly paralyze anyone, lol, but he gets up without a scratch.
Aside from that, I really enjoyed the film. Kudos to the creators for making this, they really did a great job. And if Paul W.S Anderson saw this movie, he should consider a change of career. Because Damnation makes his cashcow adaptations look like a gigantic pile of &@#>.(Not like you need Damnation to know that, though LOL)
This movie is a solid 8.5/10 for me.