Story does take a while to get going, it more or less recaps Volume 1 in the first three episodes, albeit some scenes have been altered. For some I can understand, as it would take way too much time to animate in 2D. Whereas sometimes, it alters some of the dialogue for no reason. Like that one scene, where Ruby and Weiss have a little exchange during a fight. In the anime, it sends off a different message. But once you get past the first 3 episodes, then Ice Queendom's story actually starts and puts a nice spin to the story. It's canonicity may be questionable, but if you pass it off as not-canon to the Rooster Teeth series, it's definitely worth it.
Animation looks good, Though for obvious reasons, it doesn't top the original series, since it's in 2D, isn't as smooth and lacks energy compared to it. So I wouldn't want you to get your hopes too high there.
As for music, aside from the intro, there's not really much to right home about, unfortunately. That's not to say it's bad, just that it's typical of fantasy anime and lacks the unique sound of the main series. It's not Jeff/Casey Lee Williams, that's for sure.
