I bought these tires in December 2019. They've been fitted to the car for roughly 10,000 miles now of mixed driving. The main reason I bought these tires is the advantage that they offer over a traditional summer tire in the snow and cold conditions.
I have been out for the first real test of them in the snow this morning, and I'm happy to say that they've impressed me! It goes without saying that it is an "All Season" tire so it's always going to be slightly compromised vs a full "Winter" tire in the snow, but it performed a huge amount better than a "Summer" tire would. I was able to tackle some snow covered country roads with both fair inclines and declines without the car feeling like it was struggling to grip. When coming to a stop on an incline and setting off again, there are a few seconds of wheel slip whilst the tire finds some grip, however they're fitted to a fairly heavy front wheel drive estate car so that's understandable, a little bit of wheel slip and traction control kicked in on the steepest part of the climb, but they all worked together to keep/get the car moving, but once on the move it's a really confident feeling tire. A definite note is that it drives noticeably better on fresh vs compacted snow so I have definitely aimed to keep the wheels in fresh snow where possible. Braking and steering performance were massively impressive too, enabling a confident/safe feeling drive especially down steep, twisting descents, which for me is main reason for purchasing the tire, as I've got snow chains for if I get really stuck going uphill.
Outside of the snow the rest of the year, I've not noticed any difference to a standard "Summer" tire. Both in the dry and rain I wouldn't have been able to judge any difference between these tires and the Michelin Summers that were on the car before, but perhaps if you've got something like a sports car where feedback is important, you may want a full "Summer" tire in summer. I've had some fun making good confident feeling progress down twisting roads in the summer with these tires.
They've now done roughly 12,000 miles since they were fitted and they're at about 5-6 mm which is excellent considering that the tires spend most of their life on NSL "rural" roads (pretty rough road surfaces, gravel farm tracks etc) etc. I'd say in normal driving conditions expecting 25,000 - 30,000 miles from them (changing at 3mm left)
In my opinion, they're definitely worth it!