My favorite thing about these is the subtlety and the fact that they blend well. That way, it's not obvious that you had a "dramatic" change and you can add to it day by day if you so choose. Only caveat I've noticed is that I don't think it lasts that long. It's advertised for a week and I think it's more like 3-4 days. That's fine for me, since I usually do it for a specific event or weekend, but just so you know...