This light weight serum is a power house of not only firming but removing sun damage with no irritation or break outs. I don't understand the "spin tap" but it must be the key to how it works. I use in the day time and must apply moisture over if applying liquid foundation. The scent is odd but not unpleasant and does disappear. I'm new to the line but understand the company doesn't believe products have to be harsh to get results and this proves it. Really can't hurt to try!