These are great and I hate them at the same time. They are snuggly warm and great for wearing in the winter (not when it's wet out obviously). They have good tread too, so no slipping issues. They are sturdy so unlike when you see people walking around with their heels hanging off the side of the sole, these stay centered.

The bad:
My feet sweat REALLY badly in there. I don't have sweaty feet at all, but these were like a sauna. When I got to work I had to sit barefoot to prevent ruining these. The top also dug into the top of my big toe and it was horribly painful.

I agree these run a little big, my normal size 8 fits better than sizing down to a 7, which are much too small. All in all despite loving the concept, I won't be buying these in other colors. I really wanted to love these and they lack the clunkiness of other crocs ballet flats, but unfortunately they just didn't work.