Excellent snow/ice/mud performance, no MPG loss
Winter performance is at least on-par with cheap studless winter tires, at least in PNW cold (I can't speak to how the rubber compound handles extreme cold) Mud performance is as good as any p-metric tires (even the more aggressively styled options don't have any more tread depth until you step up to LT rated tires). On road performance is as good as any high quality all season touring in terms of grip/wet/MPG, but there is an increase in road noise/vibration that's only really noticeable on smooth pavement with the windows down. I can't speak to longevity yet.