Here is a Nerium Firm Review from a customer on Amazon:
"I bought this to try on my "mommy tummy" from having 4 kiddo's. I work out faithfully but have the typical sagging tummy skin. I really did not expect any results but thought I'd give it a try, it has a money back guarantee. If it works it will be worth every penny. I took my before pic and started using the cream twice daily as instructed. 6 days later I took another pic, holy cow it was a noticeable difference. It is actually smoothing out my tummy. How is it working? I have no earthly idea but it is so I'll stick with it.
Finally... I am NOT a Nerium rep and I am NOT receiving any incentive for this positive review."
http://peacefuldelight.tumblr.com/post/130255227013/nerium-firm-reviews-from-customers