Wore it for my ride to work this morning at 37 degrees and not a hint of chill on my neck or face. It's a little snug on the face but not uncomfortably so, and fits great under my half helmet with the helmet's wind curtain on. Excellent value, highly recommended for anyone that wants to extend their riding season as long as possible like we do in northern Wisconsin.
Has kept me comfortable down to a wind chill of around 20* Fit me quite tight at first, though with stretching and a little "wear time" it became just right. Does cause some fogging with both of my Wiley-X riding glasses, though only when just starting out. Benefits definitely outweigh the minor inconvenience.