I ordered these based on the positive reviews I read here, and am really glad I did.  These are probably the most comfortable undies I've ever bought; they feel like nothing on, and really don't ride up at all.

I have a large "Italian" rear end, and my whole life I've had trouble getting undies that fit right.  These stay in place on my "bubble butt," and don't dig in.

The string bikini style, while not as sexy as a thong or tanga, is still cute and the low-cut look of these doesn't make them dowdy at all.  The fabric isn't quite as soft as I was hoping it would be, but I'm hoping that these will soften up a bit more as I wash them.

Since ordering these from Amazon means you can't choose your colors, just be aware that the colors you get could be really random.  My package focused on lime green, black, white, and grey, which aren't colors I usually would pick on my own.  They still have cute fabric, though, and they fit true to size.

I'll be sure to update my review to note how they hold up.

UPDATE ON 6/7/11: I originally gave these 5 stars, but have since downgraded my review to four stars.  While these are still very comfortable, they have already shrunk a lot from a few washings, so that the side edges are too tight.  I like them so much, though, that I'm going to re-order another pack one size up and I won't put these in the dryer.  Hopefully this will help them keep their shape.