Great lightweight and waterproof boots. The reason I gave it 4 out of 5 stars is because of the break-in. The boots cut right in the ankle where the material bends for your foots motion. The cut into your ankle is pretty bad and will wear a blister if you don't fix it. I took a rubber mallet (as a previous customer suggested) and "loosened up" the material in that area (being mindful not to destroy the zipper). After about 15-20 whacks, the boot was loose enough in the ankle not to cut into me.
The boots are very waterproof and I tested them he first time worn.
The only other small complaint is that you have to both unzip and untie laces to get in or out of them. The zipper doesn't save you from not un-tieing.
I have no doubt after another few miles they will be perfect.