I liked blue gems but I haven't gone since their reviews vanished.  Didn't really care for Halogen.  There is another service with a girl named Taylor (do a review search)  I think she is probably the best right now.

Both services are excellent. They both are strictly PV.

If you are new using this type of services, I would recommend you try either Tara from Blue Gems or Taylor from Secret Temptation. Check out their reviews.