At the end of the day, this CD has all the songs from the episode of "Rocky Horror Glee Show" and if you enjoyed the show, you will like the CD.
If you do not like Glee, or what they had to do to the songs to make the suitable for the show and their timeslot on TV, then you will not like the CD and you should buy the soundtrack from the original movie and not buy this CD.
However it is my opinion that the shows are well rounded and generally good. My personal favourite is "Dammit Janet" by Corey Monieth and Lea Michele, but i still take issue with the fact that a girl had to sing "Sweet Transvestite" but the vocals on "What happened to Saturday night?" make up for it, in my opinion.