Here's the most important thing to know - there's nothing worse than someone who sets up an appointment and then flakes. Don't be that a-hole. Don't make the call, then stay home masturbating because you actually got that far, and leave the escort with an hour of lost income. If you find that you've made the appointment but you just can't get yourself to follow through at the end, at least be man enough to go in and drop off the envelope. It's your problem if you do flake, not hers.
If it's something you want enough to go through with it, odds are that you'll be very happy you did. It's possible to get someone who just isn't into it that day, just like some days you get a bad waitress. It happens, but for the most part, they try to please. If it's an in-town person, they want return clients, and even if they're travelling, they might come back, so they want a good reputation.
My experiences have been mostly fantastic, with one 'eh....' I understand the one - sometimes I don't feel like working either. The others were head-exploding fantastic.
