Pros: Incredible grip at speed, in turns, all around awesome tire for winter riding. Will not slip or slide on hard packed snow (borderline ice) and with some gentle braking, will not slide out on ice either. Have only lost one of 294 studs, and I blame myself for that.
Cons: The fact that they're a real pain to get on the rim.
Recommendation: Comparative tests on the same roads show I'm more surefooted on ice and snow on my bike than I am with the Nokians on my car. If anybody is looking for winter tires- this is the one to get!