You should try to stick to the recommendations and schedules posted in here.
These are typically accurate although there have been the odd fake review posted to try and drum up business for a provider with a less than stellar reputation. Usually those are reposted by accounts with 0-Low reputation scores or freshly minted accounts.
Leo is a crap shoot. Once in a while you can meet a nice girl, but emphasis is on the "Once in a while"
Tryst typically has higher end ladies with high end rates, but are usually very real and reliable.
Don't be scared to use the search function on this site. It will save you a lot of time as well as prevent you from annoying some of the other users.
Last piece of advice. If it's too good to be true, it probably isn't. If you see an ad with photos of Eva Lovia, or Mia Malkova and think they're actually here selling ass in NS, maybe this hobby isn't for you.