The factory tires on my car (Continental ProContacts) lasted a whopping 27,000 miles. THESE tires, on the other hand were absolutely amazing. Hands down, the BEST tire I've ever purchased. After 50,600 miles, the tread on the outer circumference are barely worn, but because of the extreme camber of my rear wheels, the inside has worn down quite a bit. For the next set of tires, I am going to have them reduce the camber, and I expect to get at least another 10k miles on them.
But aside from my camber problem, these tires outperformed my expectations, and yet they were less expensive than the factory tires. Sometimes things in life just make no sense. But buy THESE tires, and you will not regret it.
I'm ordering my second set soon. I have told my friends about these tires, that's how much I liked them. I will continue to buy them as I go through cars.