If you want a sense of the depth of this book, it's basically a re-imagined for adults version of Adam Sandler's "Leo" kids movie. Not sure which actually came first, but either way, neither is particularly deep and both involve lots of Deus ex Machina moments.

I got some chuckles out if it along the way, but the characters don't face any complex challenges or grow in any interesting ways other than to magically shed their flaws.

The solid writing makes it a nice casual read when there's nothing else to do?