I have recently switched to these as my winter tyre. I wanted something a little more focused for the colder and wetter conditions than the Conti GP 4000 s I use for my summer tyres.
I have only covered 60 or so miles on them, but first impressions are good. I thought that they would be noticeably slower rolling than the GP 4000 s, but to be honest I am struggling to notice a major difference in that department.
No punctures on them, but no real miles yet. That said I have been lucky in that area, must be down to the roads I ride.
They seem grippy and roll well, so early conclusions are thumbs up.
I got mine from Merlin Cycles, as with their additional 10% off the basket they proved to be the cheapest I could find, plus their service and speed of delivery is excellent.