Groundbreaking visuals mix with a refined and incredibly immersive 3D effects to elevate the emotional response of the viewer to a new level. You really feel like you're here with the characters, and the characters are fir the first time digital and simultaneously alive.
The plot itself is predictable and well-worn (think Return of the Jedi meets Ferngully, or as my friend put it "Dances with Wolves with Smurfs") but it's decent enough to not drag the movie down. And honestly, I doubt any plot that was less "safe" for mass consumption would have been greenlit considering the effects budget. The studio took on a huge risk already.
Not awful, not in any way engaging or exciting. Middle of the road in almost every way. A shame, really, as I was really excited about the potential of a darker, more twisted reset of the Homes character. It worked for Batman but not here.