I loved these when I first started using them a couple of years ago, and I still have a couple of old pairs that I keep to use under bathing suits.  There's a noticeable difference between how they were then and how they are now (2012):  These days they've become thinner, the edges are less neat, and the coloring is sometimes inconsistent within a pair.  I had to return my latest pair because it arrived with some sort of dirty, gluey substance smeared on one of the covers.  I'm normally pleased with Pure Style products, so I'm disappointed that they're not keeping up the quality they once offered.

A better alternative is the Bristols 6 Nippies Skin.  They do not wrinkle like the Smooth'ems, have a neater edge, and are slightly stiffer, so they don't show through as much.  They are also a bit larger.  The Nippies do have the issue of being slightly grippy whereas the Smooth'ems are more silky, but I think the trade-off is worth it.  Nippies also come in a wider range of colors and come with a nice box, so I've switched over completely.