Winter wheels and tyres on- very interesting going to smaller, narrower tyres, the car moves around a lot more and you can feel the lack of tyre when braking (or accelerating onto a roundabout).
I live up a steep hill that has in years past totally defeated every car that tried to drive up it on summer tyres, so we shall see how this experiment pans out.
I swap out for winter wheels and tires every year. Narrow tires are goofy fun for a day but after that it's annoying.
However in the winter when snow falls, it's fun again.
And when you swap back in the spring it's like getting a new car.
Overall worth it.