Love them!
The fabric is amazing - smooth, soft, and breathable. The high waist with the ribbed, slightly thicker fabric made sure the leggings didn't budge during my entire 7+ mile run. I might have been okay to size up but the only real issue I had was getting my big ole feet through the ankle openings 😂
(For sizing reference I'm 5ft3, 50kg/110lb and purchased a Size ii.)