I do believe this product is very good but, in my case, the cincher smooths my waistline more than anything.  I am already petite, so the cincher doesn't significantly reduce my waistline.  It does, however, make my waist look A LOT smoother and hour-glass like.  You cannot really wear it under thin clothing, as others have pointed out, and, for me, it is impossible to wear it during hot summer days - the sweating and the rubber can create a rash situation - but I still recommend the product.  It is a very good and very cool cincher.  I think it can even be worn on top of clothing, for a goth or fetish look.  It is well-made and makes clothes look better on you.