I was skeptical about how exactly I would use these - are they a sweatpant or a going out pant? Turns out they're both! They're more comfy than most lounging pants I've worn, yet can totally be worn as a regular pant. I like using them for yoga; the zipper and buttons don't get in the way too much at all.
They are quite slim, but not as skin-tight as I expected based on the description, and they are quite long. I am 5'11" and 170-175 lb with pretty thick thighs and the medium is perfect. I had to hem off about 3". That being said, I do not have the longest legs for my height, and prefer a shorter inseam. If you are taller or don't mind them hitting a bit below the ankle as in the photos, it won't be an issue.
The only feedback I have would be - please offer these in a shorter inseam, and I would love to see larger back pockets in the future. I don't love the look of small back pockets, but they aren't so noticeable in the black. By the way, same for the short version of these - the length is quite long, and would love a slightly shorter version.