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I used Alfa M77's on my one year service in the militairy, and also had a pair I got from my uncle that I used for fishing, hunting and as a daily winter-boot. They're nice when you've got them properly broken in, but their insulation is not all that good, they don't breathe and I always wanted a bit more ankle support. Now I use a pair of Viking Stryn as I completely wore out the M77's, and they are a lot better. More water resistant, better grip on ice, keeps my feet a lot warmer and don't need constant polishing.
They are completely fine for light use, but if you're going to be using them a lot I'd recommend investing in a "proper" pair of boots that is specially designed for the terrain you'll be walking in