The boots fit true to size. If you're a half-size, go up to the next full size. My 11's fit perfectly. They are tapered around the ankle which allows them to grip. It may require some push to get them on, but when you're walking in a creek or muddy muck, it's nice to know they won't slip off easily. Their nice and high and have the ability to cinch up at the tops. They have a bit of a heel to them. The tread on the bottom grips decently and doesn't seem to hold mud (at least not for me yet). These are not insulated, so if you're going to be in the cold you may want to look for another boot or wear thick socks. All in all they're a good mud boot and I'm happy with my purchase.
See my video review below to see them in action.