This was almost great, still good though. My issues are, kissing feels a bit too sudden, would've liked a bit more build-up happening through scenes. I would've also liked some masturbation events as an excitement penalty with another branch of upgrades then about reserving themselves for customers; getting relief through them to try and make the kiss unlock less sudden. It's not clear to me when they became a girl entirely or if they were crossdressing up to a point. I've tried looking through the transformation dialogue and it's never really brought up either. The blowjob CG cock looks backwards...
Personal tastes; given the chance I would've avoided full girl transformation and just grabbed breast/body as much as possible to that end. As-is until sex was unlocked I didn't mind the haggling loop that much and would've enjoyed going through that more to a half-way transformed ending. There's room for twice as much content here but I understand that this is considered completed.