You know, usually the way things go is that critics like films that I tend to dislike. In the case of "Mr. Magorium's Wonder Emporium", this is a film that most critics hated, but I really liked.
This is the film that "Charlie and the Chocolate Factory" should have been. It's actually closer to "Willy Wonka and the Chocolate Factory" than most kids films that I've seen. It has subtle messages that don't hit you over the head and there's a little bit of danger.
I think most people didn't like it because (SPOILER WARNING) the lead character dies about 2/3 of the way in, but it is meant to be and the purpose of what is trying to be conveyed. (END OF SPOILER WARNING)
Please give it a try. Be patient as it is a slower-paced film than you might be accustomed to, and Dustin Hoffman isn't lisping by mistake, he's channeling Ed Wynn.