I loved my first pair of Keens, 6 - 7 yrs. ago, nearly wore the soles off them they were so comfortable. Second pair were just as comfortable but the uppers started to separate from the soles, goodbye waterproof. Gave them another chance because they were so comfortable, third pair were again very comfortable but the materials were awful, the uppers in the toe section were made of some kind of very thin fake leather that came apart like soggy paper walking through the thick stuff. Threw them away and now trying a pair of Merrells. Very comfortable and so far pretty tough. They have a little insulation in them which has been great this fall and winter but may need to find a lighter pair for the summer.
I was very disappointed that Keen's seemed to change their product a couple of generations in and not for the better. The sales person where I bought the Merrells said they had lots of complaints and Keen was supposedly making modifications. We shall see.