This movie seems to have multiple personalities. It starts out very, very dry, a little too much so. Then it warms up and is hilarious in the middle, but suddenly turns serious at the end, making it seem like a different movie entirely. A good mockumentary should build to a large climax that leaves me smiling, not depressed.
However, I do recommend seeing it. The good parts are enough to make the movie worthwhile. The private investigator is especially funny, and John Solomon's antics perfectly balance Grace's personality.
I'd be excited to see what these filmmakers do next. Though a better ending would have moved this film from six stars into eight or nine, there's certainly quite a bit of talent at work here, and a few more films under their belt might make all the difference.