I've been enjoying it so far (3 hours), and haven't played an SO since 2. The camera is a bit jerky, so I'll try turning down the sensitivity. One thing that has been odd is that there is very little intro to characters before they are dropped into your party. I know there are a lot of characters that need to join, but they could have tried a little harder at having characters join your team organically.
Also, the skill mapping thing is annoying. Unless I'm misunderstanding, you only get to map 4 battle skills (not magic) per character, 2 to X and 2 to O, and they active depending on whether you're close or far from the enemy? They should've just mapped them to other button combos.