On the highway the car is now stable at all speeds and as far as the twisties they are great, it really feels like a high performance smarts car. Way better that stock was I feel safer now at all times especially when trucks blow by you. They can get bumpy at times but I'm used to it my other car has runflats (Mini Cooper S) and they really are a harsh ride, but these aren't as harsh. Overall I love the way they ride, and especially the looks, I love the deep dish looks.