I tried these on in a running store and thought they were so comfortable.  I came home and thought about them, so I decided to order them on Amazon (they were a little cheaper too, which is always a plus!)  I followed the directions and put them in the oven before wearing.  I think it made them mold more, but I'm not sure.  They are pretty comfortable, but there is a spot that rubs on top of my foot.  They sort of throw my weight backwards, so I think I need to just wear them and break them in.  Not the prettiest thong when I look down on my foot.  They are quite wide looking.  I bought them to wear around the house and in the yard.  I think they will be perfect for that, when I get used to them.  I usually wear a 7, but bought these in size 6. I would probably buy them in one of the cute colors instead of the black ones I got.
I always recommend Amazon.  Great service and prices.