These are absolutely horrible in any wet or cold weather. In rain they lose traction easily on damp pavement. In the snow, ice or sleet they are a complete death trap and should be avoided at all costs.
These came on a vehicle I bought, and show almost no wear after over 30,000 highway miles. They're hard as a rock and will last forever. However they're so unsafe in any type of weather that we're ripping them off and replacing them, even with lots of life left.