I am in full agreement with those who say it can be draughty in a mesh inner in wind.
As well as a small triangular mesh panel at either end of my Zephyros inner, the upper half of its door is mesh along its full length.
In May 2015 I was pitched on a 600m ridge, behind a small outcrop but the wind was coming around either side of it. Although it was probably only about 20 mph, I could feel the stronger gusts blowing through the side of of my sleeping bag that was nearest the door.