This is a mostly pleasant family movie, one appropriate for the entire family, though a few parents may be concerned about some minor details. It is kind of scary at times, and there is the loss of a parent (which is handled about as gently as it could be) but there is nothing particularly harmful.
Will Spencer is quite good as 12-year-old Bobby and while there is sort of a formula here, this movie offers plenty of surprises.
Jacob Whitkin does an impressive job as both the psychiatrist and the man who looks like Merlin.
Numerous annoying inspirational songs from different genres show up from time to time. There was one song even I could like. I would describe the style as somewhere between Karen Carpenter and Feist.
The visual effects are pretty impressive but not groundbreaking.
It's pretty obvious more than one dog is used for Ozzy, and that some of the dogs may not be real. In fact, Ozzy generally looked kind of weird and unrealistic. Just use your imagination.
The ending is not the expected one but it is quite satisfying.
It's a good family film with nothing really harmful.