I ordered these shoes and got them delivered in good shape. I ensured that the night before I wore them that I would stuff the toes with extra just to ensure that my toes wouldn't be screaming after a few steps (plenty experience).
Unfortunately I didn't realise the back of my feet would do the yelling.
Was running late so I just slipped them on and ignored the tightness at the back.
big mistake.
By the end of the day my skin was rubbed raw with all that friction, and I was hobbling about in my office!

The shoes are beautiful and I guess comfortable as far as my toes were concerned,
but i definitely have to stretch the back more or kiss my skin goodbye.