WC Outdoorswrote a review of Smartwool Merino 250 Bottom - Women's on January 22, 2016
Familiarity: I've used it several times
Fit: True to size
I owned a pair of Smartwool long johns before, and I like the improvements. The wide waist band is great, and the sizing is better for me. I'm curvy, lately wear a size 14 in jeans, and bought an XL. The legs are just right - snug without being tight. I wear them under pants for hiking/backpacking and dog-walking, so I don't mind (and wouldn't notice) if the butt/waist sags, but it is a little loose around the waist, so it probably would a little if I wore them as leggings under a skirt. I didn't have any fuzzies unlike someone else's review, and they're very soft.
They're perfect for my use - hiking/backpacking. Highly recommended!