I have been pleasantly surprised by the comfort and performance of the base layer. Only wish it was a big longer in length to fit just a bit better. But I am tall so expected this could be an issue.
This is pretty much my go-to base layer for colder / chillier weather. No complaints! It wicks sweat well so it doesn't get stuffy + gross underneath my jersey. I would try to go with a smaller size since it's the first layer, and that way it doesn't bunch up underneath the jersey.