I have been wearing a pair of Sidi Vertigos for at least two years. They are comfortable, but they can blister for the first couple of months. They have very very little wind or water resistance. The boot itself is semi waterproof if you keep it well cared for, but the top flares out to get around leathers. This means that unless you have a very fatty calf, you won't get a good seal, and your boot will turn into an expensive bucket.
They do get cold in chilly weather, but it is nothing a good pair of socks can't stop.
They last excellently, and all the plastic bits can be replaced, which exends their lifestyle further. The sliders are made of cheese though, if that matter sto you.
They DO squeak like crazy for a few months, and the only things that really helped for me, until they were broken in, were sunflower oil and vaseline.