Saw it this afternoon, and I have to say I'm pretty satisfied with the movie. It's a good adaptation of the game's universe, CGI looks a lot better than I feared from the screencaps, the tweaks to adapt the story as a film are reasonable, and the acting is overall quite good (except Travis Fimmel who is just Ragnar in a Stormwind armor).
Not stellar by any means, but still one of the best video game adaptation I've seen.