I will have to deviate from the majority of negative reviews of these tires. Came as OE on my '12 Optima SX, and I couldn't be happier with the all-weather performance of these tires. I have had zero issues with hydroplaning as these tires plow seamlessly through even large puddles; as a matter of fact, I've purposely driven through large/deep puddles to test the tires and have yet to hydroplane. Have not noticed any issues with road noise as far as the tires are concerned. Winter performance is on par with other tires of their kind and, as far as dry pavement performance is concerned, these tires grip well; hard/fast cornering at interstate speeds has proven to be a non-issue.
Bottom line: These tires are excellent all-weather/season tires and, when it comes time to buy a new set of 4 tires for my '12 Optima SX, I will most likely (assuming the price is right) purchase these OE Hankook Optimo H431 tires.