If you didn't get a chance to see it yet, I would highly recommend it with a few reservations. The middle installment of the movie relates in part to the image of lesbians. Set in the 70's, it seems that the stereotypical butch lesbian was not accepted at that time. In Ellen DeGeneres' upcoming sit-com, she will play a lesbian but studio execs and those associated with the show are going to great lengths to make it known that Ellen's lesbianism will not be the focus of the show. Somehow I don't think so.
Pretty women playing lesbians or pretend lesbians stand front and center.
Perhaps that's less threatening than actual lesbians, in particular so-called 'butch' lesbians. I believe it runs deeper than Hollywood's love affair with beauty. There are many beautiful lesbians out there but not many appear in mainstream movies as beautiful lesbians. One radio announcer in my area, reacting to the unfounded rumor that Penelope Cruz might be gay, exclaimed that she'd be the most beautiful lesbian he'd ever seen. His tone implied no lesbian could be that pretty.