Purchased my first pair of tech fleece pants from ProperLBC. I have a pair of grey from NDC coming in the mail.
For those wondering about the fit, I used my Nike Track pant as a comparison.
http://store.nike.com/us/en_us/pd/track-running-pants/pid-726540/pgid-773861
I'm 5'10" athletic build, 170 lbs with a 32-33 waist. Both are size medium and fit me well.
Lengths are little long on both and the calves are tight on the tech fleece pants.
Both have a small "diaper" effect but not terrible.
I've heard about people going up in size but I stuck with my size medium.
Hope this information helps and sorry about the wall of text.
The back of the pant to compare the "diaper" effect.