I really do love these.  They feel almost like silk, they don't climb up, they don't slide down, and you forget you're even wearing them.  Plus, the price is nice.  I couldn't ask for more.  Haven't washed them yet and don't know how long they wear, but they have me happy right now.

***OK now that I've worn all but one pair; I have to say that I think there is some disparity in the sizing.  The grey pair started sliding down my bum right away.  And 2 other pair got looser and slipping-er as I wore them.  So I'm thinking quality control is not on point.