Absolutely GLORIOUS!
This truly is an EXCELLENT show, and a great way for non-players to get introduced to the Game and its Lore.
The animation is GORGEOUS. The colors and shading alone are enough to make me drool, the way light interplays with it all? The way the lighting is affected by the textures to make the colors feely hyper-realistic? Absolutely spectacular! Especially as the effects aren't limited to dramatic moments or tableaus, but it's there even in the fight scenes and chase scenes (which have some glorious motion-capture and truly epic choreography that has a sense of literal gravity to it that most 3D fails to capture).
But what I really LOVED about this series, and what makes games like League so delightful, is that every single character could be framed as being the main character. At least 6 of them genuinely vie for that frontrunner position, and a good dozen have a fully fleshed out storyline that's well worth deeply exploring. 9 episodes, 8 Champions, and half a dozen new characters, all with exactingly well-developed backstories.