I bought a pair of Merrell Chameleon Evos 5 weeks ago and had been using them 4 or 5 days a week on the treadmill (hour each session) and a couple of times a week at Thunderbird Park here in Glendale, AZ. The terrain there is usually hot with very sharp and jagged rocks attacking your feet/shoes from every direction. I hike hard and run for about 45 minutes when I go there. The Chameleon Evos were doing great, very grippy and comfortable, lightweight but protective and very breathable. Then yesterday the sole started falling apart on me. Big chunks of tread ripped off and another chunk dangling. I took them back to the store and fortunately they said they could defect them back to Merrell and give me a store credit, but that the fact of the matter was probably more likely the Evos weren't designed for such hardcore abuse. I looked around at what else they had and settled on these Moabs. I got the gore-tex because I'm going to be running around in wet canyons up in the Mogollon Rim country in the summer with them and taking trips back home to Michigan. Anyway, I have only had these for a day now but the salesman said he thought the soles of these were stiffer and had a higher carbon content than the Evos and might last me better. We'll see, I'll drop some comments to this review after I've had a chance to put them through the paces and see how they handle the punishment. I love Merrell and hope these are the ones for me!