If you don't have to travel too far the Jameela profile would definitely be worth a try. I've punted 2 girls in 2 different flats in that area with similar profiles / prices. Both gave the service I was after, and were the girl in the profile. I would go for it but be aware that you may have to walk or take a different girl, these places run on high volumes of punters.
The setup is likely to be you ring a number and actually talk to a receptionist (woman), she won't tell you she is not the girl. Then you go to the station or postcode and call again for proper directions, you may have to make another call when at the location and will be let in, then meet the girl and be asked how long you want and possibly any extras (I don't mind ow so generally don't pay any more). There is a group in Kentish town that is a similar setup, possibly part of the same group. I have been there 3 times, once I got a choice between the girl whose profile I called, and another girl whose pictures were also on Adultwork (chose the second and had a good punt), the second time there was one girl who wasn't the girl I wanted so I walked, the third time there was a choice of three girls, all quite attractive but none the girl in the photos, I chose a girl and had an ok punt. So worth risking but buyer beware.