Well i say that on a performance aspect. On road they are nice quiet and smooth. They balance well and don't give me much hassle.
BUT....
They wear out incredibly fast. All the flex of the tire was very bouncy it felt like (even at 5psi). Also they don't hold lateral traction very well.
That was the big surprise to me. Looking at the tread for km2 vs mtr, you'd think mtr would slip sideways before km2 does. Wrong. In any situation where I was taking an off camber line, the km2's would simply slide down til the tires rested on something. Upon going back with the kevlars, I took the same line and stuck like glue.
Plus. When I got the kevlars. They measured true to size.
I believe the appropriate comparison to the kevlars is the crawlers, not the km2. ( this is just my experience and opinion based on my rig set up and how/where I wheel, and is not a reflection of how it'll perform for your rig, driving style, or trail conditions. So don't get all defensive over the beloved BFG
)