Do any of you own a pair? If so, how do they fare? How much does it stretch? Does it sag on the bum/knees by the end of the day?

I tried on a pair earlier today, and while I probably have to add an extra button closure on the waist (to widen the waistline), everything else seems to fit well. As mentioned before, I'm a long-legged rectangle with apple tendencies. I'm still looking for a serviceable pair of skinny jeans (that won't cost me a fortune since I'm on a serious budget).

Thanks!