At the end of the day, Fully Committed just isn't good enough. I liked it, but I didn't love it enough to recommend it to anyone who can't see everything. In terms of funny plays, I've seen better in the last 2 seasons. Noises Off and It's Only A Play come to mind.
It's also a one man show, so they only have to pay one actor and one stand-by, not 20-30 actors like many other show. It should be pretty cheap to run.