These overshoes, when sized correctly, are excellent.  I've been using these for about 2.5 months now and they really make trekking in the snow with my doggos a lot easier. They are lightweight and provide nice high leg coverage for deeper snow.  I do a lot of hiking and camping and I'm going to do a couple of experiments with these this spring..  The 15" height would allow me to replace my gaiters and also adds another layer of water proofing to my footwear.  We'll see when the weather breaks.

My cons on these are:  1) Thin 1/2" velcro strips are used to close the boots and to adjust the tension on the ankle buckle- seems like these might be apt to wear out pretty quickly, not sure about this gripe because mine are still working fine, but in my experience velcro eventually fails after repetitive use. I feel like the velco that is used to close the boots should definitely be a little wider...maybe 1" wide. 2) The strap on the ankle buckle does not stay adjusted by itself.  You have to set the tension on the ankle strap with the velcro.  If the velco comes undone the tension will release.  I believe this is because you have to use this strap every time to take them on and off, but IMHO the buckle that holds the ankle clip should stay as tight as you set it even if the velcro accidentally releases or wears out. 3) If you're thinking about using these for hiking...I'm not sure the grip on the sole of this model will be everything you hope it will be.  I don't think these are really made for traction. This last con may not be valid because I haven't placed any trail miles on them, but I am using my experience to identify a possible issue. However, their lightness, ability to be quickly put on or taken off, and 15" leg coverage are attractive pros.

My gripes are speculative at this point because I haven't had any failures.  So if you're looking for a waterproof overshoe, I'd say these are definitely a great option.