I was a member of http://www.quintessentially.com when I first moved to London. They were useful for some things. For restaurant reservations, they could get you into the lower third of the best restaurants, but only with ample notice. I was able to get into a few private clubs, but nothing extraordinary. The most valuable thing they ever did for me was to get a table at Jean Georges in New York on Valentine's Day with just a few days notice.

Has anyone had much luck with these services? I canceled after 18 months of membership. Now that it's up to GBP750, has http://www.quintessentially.com/ improved?