Yay!  I purchased these after receiving a pair of too-large classics (the amazon size suggestion was way off).  Whereas the others had a bit of space in the heel and an uncomfortable tab digging into my achilles tendon, these fit like a glove (pun intended!).

I also don't  have to worry about using an adjustment tab.  They fit beautifully and feel wonderful.  After 2 days I already can tell that my knee pain has decreased substantially while walking.

I also was doing bodyweight squats in the kitchen for -fun- they felt so natural.  I can't wait to use these for a leg workout.