Hmmm... Overall I liked it. But it has significant problems.
- Rourke... Mumbles his way through the entire film. Get the man a speech therapist.
- The Salt Mines has to be the most ridiculus work camp ever. Just a tiny building in the middle of a salt flat. With no slave labor shown, it looked more like a tropical resort than a terrible place to be.
- The Titans were too weak to threaten the gods. Underpowered yet still managed to kill gods when the plot demanded it.
- The end... So lots of Gods were killed. But apparently that didn't matter, since there were thousands more? And they keep on fighting in the sky? (Against whom?) This seems like an odd Valhalla impression, not Greek mythology. Be a good soldier and you too can join the Gods and fight forever in the sky. 
Things I liked:
+ Battle choreography (mortal and immortal)
+ Cavil, Pinto, Hurt
+ The visual flair