Aw, I liked
Sister Act. Granted, I've seen FAR better, but if you just treat it as a live-action cartoon, you'll like it a lot better than if you try cleaving to the memory of the movie, or go looking for something resembling a semi-sensible plot or in-depth characterisation. YMMV on the score; my dad commented that while he enjoyed it, he couldn't remember a single song once he left the theatre, whereas I've gotta give Menken his credit, 'cos some of those numbers are proper catchy. I think we pretty much all agreed that it was very flat and dull until it got to the convent, but once the nuns came out to play, it improved a whole bunch. A lot of people find the male characters pointless, annoying, and incredibly underwritten. I personally enjoyed them quite a bit, although wouldn't argue with the "underwritten" claim.
Anyway, if you want a fun frothy musical filled with sequin-wearing nuns, I guarantee you won't get a better offer. Ever. Take it!
just teasing!) 
