I went last June for my first full clearing. I spent a total of nine hours in the chair, with two operators at a time. In that time they got my face, ears, and armpits. I haven't been able to afford my next visit yet, it probably won't be till summer, then I can work on going every six weeks and finishing up the face. As Kiera pointed out, they usually book way in advance, so start early to get your preferred dates.
Hugs,
Rhonda