Excellent tyre. Those that report problems should carefully check their tyre pressures. Have had mine nitrogen filled which helps to stop loss of pressure ( all tyres). Oxygen from normal air filled leaks through carcass. Nitrogen molecules larger and do not pass readily through carcass.
Had these on my car since new. Its a 2016 2 litre Skoda superb MK3. They have covered 22,400 miles and the fronts are now at 3mm and the rears at 5mm. Which i think is excellent wear rate. These are a very comfortable tyre . And quiet on the road . They feel very safe regardless of the weather . They are not a high performance tyre for a sports car so i dont feel it is fair to compare them . I have a bmw M5 aswell where i use michlin PS 4s which of course are a better handling tyre ,but the Pirelli P7 is an excellent tyre for an everyday car and normal driving , they have good wet and dry grip and are comfortable . I will probably switch to Michelin Primacy 4 when they are worn out but that is purely a personal preferance for michelin tyres. There is nothing wrong with these P7 they are an excellent tyre .
Worst tyres I've ever owned, all four cracked right around tread. Uncomfortable dangerous rubbish which I had to change. I now have Uniroyal Rainsport 3 fitted all round and the car has been transformed . No more Pirelli rubbish for me.