I can't say how well they hold up.  I've only worn them once.  The fabric was comfortable, not ultra soft, but comfortable.  I ordered one size up, and found they they didn't pull or roll down during the day.  The waist stayed flat.  The waist band was comfortable and never itched.  The fabric feels like quality, not too thin for tights.  They were very opaque, exactly what you'd prefer for tights.