Bought this tires based on good reviews here and I am so happy I did! First a few words about myself, I am big nut about tires, I used to have Tire Business in my country before I moved to the US. I drive two Mercedes 2003 and 2005 E320 CDI, so lets talk about the tires, first this is high quality tires with a good price and as all new tires they are quiet and smooth, but they are better then the rest , on 2003 e320 I have Good Year ComfortTread Touring, Before was Turanza Serenety, and before Serenety was Mich.,(drive my e320 for 9 years) so Why Pirelli is best over them, First, once they installed they smooth NO VIBRATION unlike Turanzas Surenety(8 times for balance 16 tires and sold them after 800 mile because bad vibration. Second, Pirelli is super Stable unlike GY Comfort Tread Touring( Puling to one side of the road and then to another, depends on the road slop). About ride comfort, they are quiet but transmit little bit more road imperfections like road joints compere to the GY, but Performance way better to GY CTT. So based on my pretty fresh experience I found This Pirelli Cintureto All Season P7 is superior to the tires I have and hand on my two Benzes include Mich., Bridge, GoodYears, Hankooks. Get them and you will feel how very confident, super stable, quiet your car is. About tread life, I can't say now but just let you know I change my tires close around 30 000 miles , Why??? because all tires get very noisy and rough over 30 000. remember this.