Wow. This tire tread looks to be fairly aggressive, and looks like it would probably not be good for the cold and snow. However, that sunflower oil in the compound really keeps this rubber pliable in the cold. In the warmer weather, this tire is smooth, responsive, fairly quiet, with just the slightest hint of vagueness on-center - you really have to be paying attention to notice it. In the snow, you can feel that the tires remain pliable, and that keeps traction even for a tire that does not have very aggressive sipes or grooves for snow. You get very little wheelspin in snow, and letting up on the go pedal or going easy on the clutch keeps the car moving in bad weather. Impressive.
For grand touring tires, these do well on the grand touring front, and respectably well in the cold. Even when it has been in the single digit temps recently, they are still pliable and grip in the slop. Pricey tires, but worth it.