It's pretty good. I really hate ATB, though. They need to either go back to FFX style battle, or do it like in FFXI. I finished up to just past the part with the ruins last night, then I had to go to bed.

The art book shows Tidus and Yuna together before the FFX section, so I suspect that they find eachother; however there are also pics of a guy that looks pretty damn close to Tidus, so I expect that that's the guy in the sphere that started this whole thing