I am a big Keen's fan. These have a very different fit and feel from my other Keens; these are much lighter and more flexible in the base.  They are still comfortable and have a better  grip on the soles. The combined breathability and waterproofing is impressive.
My big complaint is the laces are very slippery, be ready to double knot them! Also,
I'm not impressed with their durability; they seem to be taking more damage from wear and tear than other similar boots.
By the way,  the pair I bought were sold as in "used" condition, at a much discounted price. Buying them used was a gamble for me. But they really were like new. They just came in a plain shoe box and appeared to have a very slight stain on one boot. That was a complete non-issue for hiking boots to be worn in the rough.