I watched it last night with Baba and Clanpaw. It was endearing, realistic, honest, and downright hysterical!
The Simon Birch character is hysterical and wise beyond his years. The "Best Christmas Pageant Ever" was altogether the funniest thing I have ever seen. It was just such a realistic representation of all the odd occurrences I've experienced during my children's' choir years and when they lopped the head off the turtle dove and the angel yacked on Ms. Leavey, I felt right at home.
In the end, it's a must watch for more reasons than one. Rent. Watch. Enjoy.