I'm a triathlete.  I wear these after long Saturday rides and long Sunday runs, and they really take that next-day heaviness out of your legs.  As some have noted, the oversized stitching on the ankle hole can be uncomfortable.  Ditto the toe hole.  If you're awake, you can adjust where the seams sit and remove the pressure.  But I often sleep in these, and sometimes I weak up and have to take them off because painful pressure points develop sometimes -- that's why I give 4 stars to what would otherwise be a 5-star product.  I wouldn't cut off the "footies" for comfort because the compression around the ankle joint is very valuable to me.

I'm 5'8 and 160 lbs, 31" inseam, and the size 3 is a good fit.  They're expensive, but seems to work as well as a post-run massage, and you only need to buy these once.