Tries hard to be great, does not succeed. It manages to be so-so. Gorgeous CGI-matography up in the clouds, the scenery is magnificent. The giants look alright but movement is poorly animated, plus they vary in size from scene to scene like it's nobody's business. The beanstalks are decent enough but overall, the CGI doesn't hold up all the way which breaks the immersion - very disturbing.
Actors are passable, script is weak, story is lame, people are stupid etc etc. Every piece of even remotely possible gore is effectively neutralized by cutaway shots and bloodless props/CGI.
How the hell can a giant explode a few meters away and shower you in body parts, and there isn't even a single drop of blood? Roderick's corpse is stomped by a running giant, whose footfalls shake the ground and there isn't even a single drop of blood?
I feel I've been generous in my comment, it's not all bad but there is just nothing worth seeing apart from the giants and their land in the clouds. It's just too childish, weak and inconsistent.