I am 5'9', a muscular 145 pounds. The medium in these pants fit like a dream. Hug the butt just right, a modern slim flare, and hit the tops of my feet, which is hard to come by in lounge pants.
The material is more of a soft cotton than an athletic blend, which I like, but it may show wear more easily over time. But for the overall look and price, I don't think it can be beat.
The cut and fitting is definitely very flattering and makes my legs and butt looked like a supermodel's. I wear it every single exercise regime I go to. XDD
One minus side is the hemmings kinda give way after a few wears and washed, but I regard it as normal wear and tear. Though I'd expect the hemmings to last longer given the price tag