I had pirelli p zeros on my cobalt ss back in 2006, they lasted 4000km, they were $400/tire at the time, I then put kuhmo uhp tires, can't remember which model. And I got about 18000km on them and they had way better traction. Now remember these are uhp tires so treadwear sucks and I was about 19 at the time so I had a heavy right foot. I will be putting Hankook v12 evos on my forte when the stock tires wear out. So I don't think the pirellis are worth the money but some people do like them so I don't know.... for the sorento, I'm still undecided on what tires to go with if i ever get bigger wheels or change the tires. Heard lots of people don't like the stock kuhmo tires though.