This should be reiterated:
its a B movie about Jesus fighting vampires to save lesbians. 
It's a really great movie, but I do have to admit it goes downhill big time after Jesus cuts his hair and the end of the musical number.  Check it out, though.  If you can appreciate B movies in general, you'll LOVE this one.  If you totally hate B movies, you'll probably still get a kick out of parts of it, but it may not be the best thing ever for you.