I'm 5'10" 180lbs 31" waist. I wanted a short that gave me the flexibility and comfort of an athletic short with the utility, durability, and appearance of cargo short. The medium fit the bill darn near perfectly. A problem I kept finding with other shorts (even nice hiking/climbing shorts) was that they restricted my movement far too much, especially on routes where high feet are required. I basically needed a 32" in the waist but a 34" through the legs in order to get he flexibility I wanted. The stretch solved my problem, providing an awesome range of motion. I love the built in belt because it allows me to comfortably wear my backpacking pack without a belt digging into my hips. I cannot yet speak to their durability, and they're obviously not as durable as thick canvas short, but for me the comfort, flexibility, and utility afforded by them far outweighs "durability"--they're shorts, not combat pants. I ordered two pairs first then after a week of adventuring I ordered another two. I was that sold on them. I wear them around town and to the crag. Just awesome.