Good animation, great visuals, okay-okay story, likeable characters, fantastic action. CGI sometimes doesn't look good but turned out great towards the end. It's mostly a mindless action series but does deal with some themes like class system and others which can't be gotten into without spoiling the series.
The main selling point for me was that the main characters were likeable and you wanted them to survive and be on the next episode. You're not looking to see who dies most gruesomely next, like a lot of its contemporaries. I found the comedy to be quite good as well at parts.
Not much else to say, would recomend it. It's a small fun action packed series.