In reply to Frankie boy:
Icarus- can comment on newer ones, but just in case it’s still relevant.
I fully expect improvements from original zip and popper and certainly hope so. Originally main zip and associated popper at hem were very poor and so frustrating. Popper would pop under minimal tension eg just by even sitting, bending down and hands in pockets, and without it the zip easily unzipped from bottom (it was a one way zip which dislodged itself). The popper use was essential not optional in early models.
The popper on mine actually broke after very little and only a few months use and I had to pay for replacement since the retailer refused to be involved. Unfortunately I didn’t get to use the jacket very much as it was so frustrating since it was when will it give out rather than if. Not reliable to risk.
Nice warmth to the jacket for weight as I recall on early ones but I personally didn’t like the cut and some other things. Hopefully Montane have overcome the “fault”.