I have an AWD Pacifica and have a separate set of winter tires mounted on rims with TMPS sensors installed. So twice a year, I visit my local shop and they swap everything out for about $25. Even with AWD, the difference with winter tires is significant. The rubber compound on winter tires stays softer in cold weather and it provides more grip. The design of the grooves in the tread is also made to deal with expelling snow more efficiently. On my previous van (Town & Country), I also had separate winter tires and rims. I sometimes work for a well-known cable network that covers a lot of weather and I can report that winter tires, even on a FWD vehicle, greatly improve handling, starting and stopping. I have attended the Bridgestone winter driving school and have driven identical vehicles on an identical ice/snow covered course with the only difference being one had all-season tires and the other had winter tires. The difference is astounding, especially stopping distance. In many parts of Canada, winter tires are required for safety reasons. I have spoken to professional drivers about the benefits of winter tires and they all say it's a no-brainer. Yes, they also save wear on your all-season tires. RE the sensors, I lived without them in the winter on my previous vehicle but decided the small cost was worth it.