I have about 500 mile on mine since install and the driving & handling are second to none (as far as springs go).
We always do some spirited driving thru the mountains here in Georgia and after we stop for lunch on several occasions the guys following me asked "what kind of coil overs are running" and when I tell them just springs 2 people had to look under my car b/c they didn't believe me.
And I'm not that good of driver just average,this springs were definitely designed for this car and done very well.