Summary: I really like these winter performance tires on my 2012 BMW 328i, actually more so than the standard run flats that came with the car. They are both quiet and provide a smooth ride while still providing the handling that I expect with a sports sedan. Traction in snow and on wet pavement has been excellent. I highly recommend them.
Summary: Living in Colorado makes dedicated winter tires a must if you spend anytime in the mountains. I bought my first set of Alpin PA3s for my 4.2L Audi A6 two winters ago. A sidewall puncture during our most recent week-long subzero Arctic freeze required a complete new set and I did not hesitate to get a new set. They are extremely quiet and handle so well on snow and ice that you can drive as aggressively as you do on dry pavement.
Summary: Bought Primacy Alpin PA3 winter tires (mounted on after-market alloy wheels) for my(then new) 2009 Honda Sport Fit. Then there were very few choices in 185/55R16 size, so I went with tire-dealer-recommended 195/60R15 on 15"-6.5" wheel. Very happy with this winter-use-only tire, and also with this size tire on the car. Just changed over to start fifth year.
Summary: I bought my second set of Michelin's a year ago and went with Primacy's this time on my 8 year old Pacifica. I couldn't be happier, as the ride is smooth and I hear very little road noise. I use this vehicle daily to get to and from work. These tires handle beautifully in the rain and I feel secure knowing i won't skid or slip on wet pavement with sudden stops.
Summary: I live in SW Ohio and we get occasional snowstorms, and the OE tires didn't cut it for driving in snow. I prefer having winter tires mounted to their own rims, to make changing for different seasons easier. I have used Michelin snows for all of my cars. The place where these tires pay for themselves is when you start. They grip the snow and get you moving, once going they give good feedback.