If you've got them, then you might as well. My only concern with running the winters until they're worn is that worn winters are properly naff in wet weather. However, the Sorento won't exactly be driven like the GT86Pure laziness on my part. I was just going to wear them out then swap to premium summer/all seasons and carry on, rather than swapping in the spring. I live in Kent, so we barely get winter weather bad enough to justify swapping tyres twice a year. But I guess there's no harm is swapping them in spring and storing them.
Car is nothing exciting...Kia Sorento, hardly the epitome of driving dynamics.
Pretty much this. Varies from place to place.I've turned up with tyres in my boot before, but I called first, to check prices.