I've seen it twice with different casts. Answer to your qs:
1) really good but not for the faint hearted! 2) boyfriend quite possibly would be the only or one of very few men there. Better to make a girly night out IMO unless you know him very well and he is not easily embarrassed!
Really good - well worth a trip. I think taking a guy would be 'worse' than taking a guy to see Mamma Mia (which some of my unreconstructed male friends regard as beyond the pale - which thinks I shall make my reconstructed male friends go to see the Monologues when they are next on in Leeds!).