There are so many leggings out there now, and I just wanted plain, very black, comfy, opaque, leggings with enough stretch to never bag (and not be $40-50, that's NUTS to pay for heavier tights!).  These are PERFECT.  I have bigger legs and I got the size L and they fit like a dream, without squeezing and making my legs look worse -- and without having to yank them up or 'arrange' them like I have with thinner or less elastic pairs.

I should mention that I am about 5'6" and the length is perfect.  No issues here with that for me.

I don't know if they pill or not like someone said I have worn them long enough, but I totally *hated* taking them off after wearing them for the weekend. They look great with a tunic and wedge boots or high heels or with a tee shirt, blazer and wedge sneakers.  LOVE them and am going to buy more.