M--I love the tights. Unfortunately, I've had to give up running due to persistent ankle/achilles woes, so I won't be using the tights.

For sizing, they are compression tights and I found that they run small in terms of sizing. But that might just be because they are ultra compression. LOL. I'm petite but have muscular legs/glutes--I'm 5'5" and weigh 120-125, btw.

I really love the tights. Very very supportive. High quality in terms of material and manufacturing. They also kept me warm when I was running outside last winter.

BTW, I am keeping the CW-X shorts.