I'm hard to impress but these balancers are awsome. It's like having a life time spin balance. My rear tire has about 13000 miles and my front has 17000 and there starting to feel lose in the corners and the back was humming when you lean in the turns. Now with the Centramatic those same tires feel like a new set, cornering feels safe and secure, and the humming is going away. I usually get 15 to 16000 on the back, I can't wait to see if it goes longer. I have Dunlop E3's now, which I like best for milage but the price has jumped up so now I'm going to try Bridgestones.