I suppose this post has two questions aimed towards the providers of course.
1) Are you MSOG (multiple shots on the goal)?
Personally, I cannot find a thing more frustrating than busting off a great one and wanting more only to find I've essentially hit snake eyes paying for a full session and getting one shot. Particularly since I always book at least 1 hour.
2) Are you YMMV (your mileage may vary)?
I rarely see a provider who is up front about YMMV. While I completely comprehend that certain circumstances may change the course of a session (i.e. bad hygiene, poor chemistry, fatigue, etc.), it would be great to get some provider insight into what causes YMMV.