I was on the fence about getting a corner balance for my EK since the shop said it wouldn't make much of a difference but i ended up doing it anyway although mine is just a street car. I did notice a difference in handling during aggressive driving and the car just feels "lighter on it's feet" for lack of a better term. But if i had the option to do it again i wouldn't as i don't believe the gains are worth it based on most shops asking price for the service. Now if you're road racing or autocrossing that's a totally different story...