It's really good. It took me a while though to realize that it does the thing where they rely on side content to develop party members. So in the main story, the XC1 party is just there after their 'arc' is done. Shulk, the story (even though the final section is somewhat half-baked, world, and gameplay (even though it barely has any variety compared to XC2 or 3) is what kept me going.