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In a word, abysmal. The tires track with every ripple in the road, leading to constant countering and efforts trying to save the car from sucking itself into the kerb or just squirreling about on the road. Previously I've had Pirellis on the same car which planted, stable and predictable. These do grip fine and let go progressively but they're getting replaced long before they're finished as driving on them is a real chore and they're not enough all that comfy for 50% profile tires. Very disappointing. They also claim to be fuel-saving, but there's no sign of improved economy from them for me.