If you are going to use an agency escort, check a variety of sites before booking as same girls 90% of time are advertised on them. They usually have review sections, if the same girl on different sites is getting consistently good or bad comments across the board, it is an indicator of their service level. I have used Diva and Agency Barracuda a few times, only had one that was a so so punt. Also Diva don't normally hide negative comments.