tulpe I have one. I don't have any problems doing up the zip, but the first couple of times I had trouble undoing it at the bottom. Actually I was in a bit of a panic as it seemed completely stuck. It's totally fine now now, think it was just stiff. Are you reluctant to send it back because there's a wait on them now?
Ruby - my ski jacket and at least one hoodie I own is double zip and they can be awkward but not as bad as this! I stood there yesterday for 10 minutes whilst DH tried to zip it up for me......felt like a sodding toddler
Allnew - so perhaps I need to just zip and unzip several times if stiffness is the problem? The mechanism slots together okay but then it won't budge from the bottom .
And although I wasn't aware of a waiting period (haven't actually checked) that would put me off returning it. I am wearing it almost every day at the moment and couldn't face spending time apart from it!