First Micro-dermabrasion

I had my first facial peel yesterday. It was great. My skin was really red afterwards and is still a bit red. I have generally sensitive skin so it is no surprise, but it feels great now. I went to a new place to get my facial and she was fantastic. I had not asked for a peel, but when I was having my facial she did it. I fell asleep during the facial and next thing you now my face was as smooth as a babies bum. I loved it. I have booked another one for the 27th of December. can't wait. How much facial acid is too much I wonder??? I would go back tomorrow if I could.