Only booked one, it was in Tijuana a few years ago and (from memory) cost me somewhere between $200-300. I may well feel differently about it had I paid more.... but this is how it went:
1. Meet in hotel reception
2. Offer of sit in the bar, declined, asked if she wanted something to eat/drink to take up to room - a few snacks
3. She showers (I had already), sit and watch some telly
4. Comes out wearing bath robe, nothing underneath
5. Get acquanted, BJ, some kissing etc - totally taking our time
6. Move into bed (and of course fuck session)
7. Snack time
8. Getting late, by now about 3 hours had passed - didn't want to wake up on my own to find my legs tied, laptop/uniform gone.... so did the decent thing and let her go. (I am a one shot guy, so there is absolutely no prospect of a round #2).
So in short, I used it as an unlimited time punt, for which it was very enjoyable. Nice not to have any time limit. As I say, had I paid £1500 I'd have felt differently about it.