The story is meh. A lot of it reminds me of FF7/8, including a lot of specific scenes. Not saying the stories are the same, but there are tons of parts where I was like, "Didn't I see this before?"
The gameplay isn't bad, but the controls and AI are sometimes infuriating. You tell a member to retreat, because either you want them out of the water, or not cast magic, then they'll do it anyways. Sometimes you suddenly run up the wall, slash instead of switch, hide instead of roll, etc. all because they're all the same button. The crappy part about the Wii. Left thumb stick also sucks, especially when you have to jiggle the stick.
Even installed on a flash drive, it lags. It was so much worse when I was running it from a disk. There's slowdowns in fights, and just traveling. It's pretty ridiculous. It's going to cause it to be hit hard on the ratings department here, I'm anticipating.
It has some nice CGs occasionally, but most of it still look like a last gen game.
tl;dr: 7.5/10 installed, probably <5/10 off disk.