I received a full-size sample for free on Black Friday last year, and I've been using it three to four times a week. It is absolutely exfoliating in my experience. After using it for several months, it didn't cause me to break out or get sensitive to it (I have sensitive skin and can have allergies from continuous use). Sometimes it stings a little when applied initially, but other than that, it seems fine.
Go to the linked page and complete the form. The first one thousand people who sign up will receive a full-size Neostrata Glycolic Renewal Serum for free, worth $85!
Hurry! While the still have stocks.