Let's face it, it's a video game inspired movie. It isn't something that is going to be up for Academy Awards in the US.
That said, it is definitely on the good end of the spectrum for a Video Game movie.
Personally, I like the animation style, though I can see where some might not care for cell-shaded animation.
It is definitely better than Dragon Age Redemption, though I do not fault Felicia Day or Knights of Good for the limitations of that production. Dragon Age is simply something that cannot be done on a limited budget as a live action production.
The story is predictable, and some of the voice acting isn't that great; but, again, it's a straight to DVD/Blu-Ray (atleast in the US) videogame movie made by a Japanese Studio based on a Western RPG and then dubbed with english speaking voice actors.
In the end, you probably know whether you're going to like the movie before you even read any reviews. If you're not familiar with Dragon Age, or tend to not like movies based off video games, or don't like anime you should probably skip this movie. Otherwise, you probably won't regret watching it at least once.