We got them for my husband! He says they are very comfortable and lightweight, and his feet don't hurt after hours of work, but after an 8-hour shift, his feet smell slightly. With clean socks and feet, of course. He won't choose them again! And neither will I.
Update: They basically lasted 6 months. They are not waterproof

Good construction like a shoe and looks very sturdy for its price, but
1) it is definitely not waterproof in any case
2) the sole underneath is quite hard. I have put gel insoles and still feel the bottom part very hard.