For a 2.5 tonne, 339bhp, 4x4 I was amazed that these were due to last to around 40,000 miles; it was only a surprise tracking problem that wiped out the inside edges of two tyres that cut their life short at 32,000 miles. Very impressive for a car of this weight and power!
I never had any issues whatsoever with grip in either wet or dry, although I never experienced them in ice. What they did suffer from was, occasionally alarming, tram-lining, although this may have been simply down to this car and the width of these tyres. I have since swapped to an alternative tyre, with different wheels and tyres, which are 255 section (instead of 275 section) and this problem has gone.
The the NCS ("noise canceling systems" - or strips of sound deadening foam on the inside of the tyre, they are very quiet indeed.
Performance in snow is utterly outstanding for an All Season (rather than dedicated winter tyre). I was the last car moving on Bodmin Moor when the snow storm hit in February 2019! That's the snow storm that hit the news, with several hundred people stuck on the A30 on the moor overnight - nasty! Okay, it's a full sized Range Rover, but it climbed a 1:5 hill, over several hundred yards, with 4" of snow on it, without a single moment's loss of grip. I now keep a set of these tyres as my dedicated winter tyres!
Any other downsides? The rim protection is a bit mean in comparison to my Michelin Latitude Sport summer only tyres but, other than that, highly recommended.