I'm not going to say it was Awesome, cause it did have some faults.
Overall, I kind of felt the voice acting was a bit weak. Hamill and Headey stole the show, followed by Eisenberg. That Hamill and Eisenberg stand out is not a surprise, both have tons of experience in VA roles. Kevin Conroy was mostly forgettable as merman, which was a surprise.
But SMG as Teela, who is arguably gets the most screen time was fairly flat in on the emotional range. This is one of those times I think they should have gone after Jennifer Hale (Femshep's VA) for the role of Teela. I didn't think SMG was bad, just didn't really get a sense of anger at the betrayal bits.
That said, I will probably re-watch it. And definitely will watch Part 2.
They should have just released it as a single 2hr movie instead of 5 24m episodes.