I initially ordered the Arcteryx Atom LT, which alas does not fit me (Medium was too small, and large way oversized). So I moved on and bought the ventrix and I really love it ! It's warm, breath well so you dry quickly. I used it in the low 20's for skiing and was fine all day.
So why 4 stars ? Because really the one I want would be a summit series without the hood, and it does not exist. The wrist cuff in particular are nicer on the summit version but is it worth the overpricing of the summit series,. definitely not.
Overall I highly recommend this item for any outdoor activities.
Bonus : The color selection is awesome, it's too bad that the 2018 one tend to go back to more "boring" colors