Replaced a 2007 Corolla OEM tires with the Primacy MXV4's. I was disappointed that the handling wasn't very noticeable better than the cheap OEM tires. The tread wear has been exceptional and the tire was good, but not exceptional with everything else.
I used the tires for three seasons and found that they are best suited for deep snow and are less effective for wet and icy conditions. Their deep snow effectiveness was gone after 40,000 km though. They are very noisy and they feel squishy when cornering. I wouldn't buy them again.