I bought this a overall winter boots for Russian winter mostly. We got a very changing  winter weather here from 2C to -30C.
Pros:
- Good for different temperatures, you're not going to overheated when its 5C or frozen in -20C.
- Waterproof now I'm just do not care about those small water pools which are everywhere during the thaw.
- Breathable feels like you do not sweat at all.

Cons(-1 star for each):
- Very-very slippery when you step on ice especially on a wet ice the traction just disappears. Looks like the problem is in this vibram thing, regular rubber holds much better on ice.
- Feels a bulky on feet, however it may be my personal issue, I have narrow and long feet but I still consider it as a boot problem since laces do not allow much adjustment.