My success with private label tires has not been good. They're fine for...oh lets say, the first 10K-15K miles then, you start spending money on tires again because the private label tires don't deliver past that mileage. Other members may disagree!
I have had a couple of vehicles that did OK with priveat label tire but, most of todays vehicles seem to like better tires that hold up closer to their treadlife rating and, perform excellent to very good all the way there, even if they don't get to the treadlife rating(which most don't).