Booking
Don't book a meeting any longer than it takes you to ejaculate
Let her know you are setting your own timer.
You are about to pay £40 plus for a very transient experience so you do not want to be short changed on your paid for time(especially if you dont pop early and need it)
Be very clear about what you want during the action and dont pussy foot about. There's nothing to gain from this. All you will do is leave feeling you did not get what you wanted out of the experience. If you want to spunk on her face or whatever then make sure you do so without compromising
If during the punt she is mucking you about get dressed and demand you money back
After the punt
Once you have seen a girl twice then ask her her policy on returning visitors. If you are going to keep returning to the same girl then there has to a benefit in it for you otherwise if she still wants full price then you might aswell see another girl. If she agrees it shows she values your repeat custom
Frequency
Space your punts out this makes them more pleasurable
Its easy to give in to the urge to punt in quick succession but you don't get much pleasure out of it. 1 to 2 times a month is sufficient
Punther, I have to say that I find some of these views odd, perhaps it's the difference between punting for a year, to in my case about 15 years. Perhaps I would have agreed with more of your points 12 months in but less so as time has progressed.
With regard to length of booking, personally I want as long as possible because the object for me is not simply to shoot my muck. With the right girl I want at least two hours and maybe longer. My last 90 minute booking was with a girl so amazing that it turned into a 4 hour booking. I've never done a 15 minute booking and its not something I would be interested in. As for setting your own timer, I know some do it, but what a mood killer and a way to remind everyone concerned that its a paid transaction. I'm well aware that's this is precisely what it is but a really good girl will make you forget that, highly unlikely with a clock ticking away to remind them that they're not getting away with a minute. Moreover, for the girls who don't clock watch, aren't they more likely to react by saying fuck you then, you'll get your full time but not a minute more!
As for being prescriptive about what you want... been there and done that but came full circle and realised that great sex can't be that prescriptive. My best punts are spontaneous and unexpected and I don't punt to a project plan, again it can destroy the illusion and remind the girl that it's a formal transaction.
Good luck with demanding money back if things don't go well during the meet, I managed to get some of my money back once after a 10 minute stand off but be prepared for a discussion with Sergei.
Ask a girl her policy on returning visitors and she'll say, yes, I see repeat visitors. Don't expect her to offer a discount unless you are rather more direct and ask for a discount.
As for frequency of points, again, I'm not punting to a calendar. One of my biggest problems is that I want to punt when I'm horny, which isn't always when the majority of girls are working during the 9-5. 1 or 2 times a month may be sufficient for you, but that depends on your own libido and perhaps the frequency with which you get sex from a wife or partner. Since I have neither then I'd prefer to punt rather more but of course Like most punters I have to manage the punting budget or the spending could get silly. I could punt on consecutive days and get as much pleasure from it, because for me, the more sex I get, the more I want.
I'd say we generally look for different things from our punts and what works for you doesn't really work for me.