I like the idea of these pants and would have kept them except:
The knee area is simultaneously stiff (so it's hard to bend your knees) and instantly baggy. The bagginess would almost be forgiveable if it wasn't entirely uncharacteristic of denim. But since this is more of a knit fabric, I guess it will happen. See photo for interior view (weave) of fabric.
Further to that point, the seams are stitched inside with a light beige thread so when the "denim" stretches, you see light colored thread which kinda exaggerates the fact that the seam is stretching.
So that's my nitpicking about things that should be improved at this price-point. But I do love the idea of a flat waistband and stretchy "denim" on a straight leg/skinny jean. But my search goes on...