I've just completed my 3rd winter season on there tyres totalling approx 20,000 miles on all road types & conditions. Fantastic grip in corners, stopping power and comfort, very quiet on all read surfaces and even after 20k miles have 5mm of tread left. Gives great confidence when driving in winter conditions that I've never felt before. The only reason for not giving 100% is a very slight squirming in the dry when taking fast "S" bends, but with such a heavy car I can't complain. A fantastic tyre and would definitely recommend and buy again.
Have spent two full winters living in the mountains on the Italian Austrian border, driving between ski resorts on steep twisting mountain roads and motorways that were sometimes covered in deep snow and ice, as well as days when it was heavy rain or even in springtime 30 degrees hot......and the Wintersport 4D's never let me down. On more than one occasion I got out where others also in 4x4's were having to fit snowchains. They always felt assured. They have had 15000 miles of use and still have loads of tread left. I use Michelin Primacy 3 in the summer but actually prefer the Wintersport 4D for feel and handling, they are certainly better off road too. I was recommended this tyre by someone that had used them and can only echo that recommendation. The drive to our house had a steep drive which often became sheet ice that you could not walk on, but with these tyres on the car just drove out like you were on tarmac. Will definitely buy them again.
I have put these tyres on, and went on a 600km trip in pouring rain, and it was like driving on dry roads - even deeper ponds at high speeds are handled great. After an hour, snow started falling and temperature went down, but no change, Dunlop performed perfectly. At the end of the trip, it was dry road and this "test" was over in beautiful manner: these tyres are great. Silent, comfortable and you can feel that it is a premium tyre. Guys at the shop commented that, from their experience, 4D lasts longer than Wintersport 5 and that they are a great choice. I think they were right, and we will se about the wear rate. But right now, I don't care - I love them!