Worth getting a VIP with?

I am under the impression that extras are rare at this place (correct me if I'm wrong). I tried their VIP area (30 minute), and there is really no privacy (i.e. no curtain or door, and maybe a camera looking down on you?). Plus people can just walk past you while you are on the VIP couch.

The two girls that I was thinking about getting a VIP with is Frankie and Astro. Anyone have any experience with either of them? Worth it?