I have had only two poor experiences in the last five years or more. Both were the youngest and prettiest in the lineups. See Glen's comments - I am an old fart also.
Mostly I have had good to great FS activities, although a few have tried to ride me to the end. Not many of the girls offer extras, unlike the place in CanningHwy where they all have about six options at different prices. One good thing here, the mamasan occasionally recommends an alternative to my choice after the lineup, which I take as a hint that my chosen girl may prefer not to entertain me.