This is just my opinion but after watching a screener of this movie, I found myself thoroughly enjoying it and I even laughed out loud a handful of times. I was skeptical at first about whether I wanted to give this type of movie 85 minutes of my life, now I'm glad I did.
I can see why Charlie Sheen, Hilary Duff, and the other famous actors would do this movie. It's different and more sentimental than most of the movies they are frequently doing.
I'd recommend this movie to most movie goers out there, but mainly for a high school or more youthful audience. They will get a kick out of the witty writing and comedy that Josh Gad provides.