Saw this with my daughter over the weekend. We loved it. She keeps asking me about that robot and if we can see it again.
Bring on the Baymax toys.
Don't get me wrong, this is a kids story. There are plotholes that are ignored because, well, kids. They won't notice.
My biggest issue in the end is just how neatly everything is tidied up. I mean, they give closure to a back story of a back story. There is little room left for uncomfortable "what happened to..." questions.