Merry chrimbo everyone :)

I've got an ME firefly paclite jacket (the sealed pocket version) that i'm taking on my first trip to the Cairngorms in January.

My question is: do you reckon its going to stand up to the worst the gorms can throw at me??? My biggest worry is the main 'water resistant' zip cos the storm flap aint particularly secure. I'll not even mention sharp ice axes and flailing crampons...

Any one with any experience with the jacket (and anybody else as well) - advice would be very much appreciated - cheers!