I liked it. Left the film smiling. I didn't like how they left certain characters, but that feeling was eclipsed by the outcome (which I loved) those fates produced. It's wrong to call it a sequel to Split with a covering of Unbreakable over it. The clue is in the title. Although you won't get it until the at least the second act, the film is very much about Elijah Price.
I agree with Mark Kermode... if you want to enjoy this film, you have to go with it.