Hi CruisinGiGi, I had this done on the Carnival Dream last year. I did not notice any difference. I found out afterward that you're supposed to keep doing it periodically and you're not really supposed to notice any results until you've done it multiple times.
It did lead to the spa personnel encouraging me to keep buying spa treatments (with discounts) until I had spent $500 just at the spa. It was a learning experience, but I'll never do it again. I wish I had just gotten a relaxing massage instead. I ended up getting a mani/pedi and microdermabrasion. My face was beet red for 2 days, but after that my skin did look pretty good for a while.