I have had two 30min sessions with two different Hungarian women, who have allowed 2 pops within that time.
I have had two 1hr punts at £100 a session with two different women, the first lady I had seen before for 30mins was the best looking punt I've had this year. The session was more of a GFE experience, a lot of talking (on my part) after the first found. I ended up popping once because the condom got stuck in side of her after about 48mins and I left early. Was a bit of work to get that second pop anyway, I was sweating, drilling away and the condom came off and got stuck inside of her.
The second 1hr punt was with Lucy Kent, was a good session but again took me a while to get that second pop and it ended up being a sweaty round 2, I don't like to sweat and work with prossies because I do all of that in my private life.
If you can manage 3 pops then 1hr is worth it but for me it is not worth it, in my private life I can manage 3 pops in a hour but with prossies two pops then I lose interest.