I have had the jacket for a month so far, so no use in snow but as a skiing instructor working on outdoor artificial slopes it has seen its fair share of rain. It is amazing in heavy rain, it just seems to refuse to even start to get wet. I forgot it one day and used my (non gore-te/mountain equipment) '15000mm' waterproof jacket, within a few hours it was leaking in seams and the fabric was starting to let water through.
The Kamchatka is also very breathable, it is really comfortable to wear and windproof. If you want a high performance jacket for use in rain and snow when you will be doing physical exercise i would recommend it. For low intensity sports you should get something insulated as it is just a shell so can need a lot of layers underneath on cold days.