I love mine, its at least as confortable (maybe better) as before I lower the ride 1.5". On race mode its a tight bumpy ride, I likeed that for dragging the car remains straght at take of and not like the mustang GT that moves its weight to the back like crasy!

I wrote this on my site about my suspension:


This suspension set up is the best in the industry. The shocks are adjustable to your driving needs a comfortable ride in the city or a stiff racing characteristic. The springs are less expensive than eibach and it’s a lower drop.



KONI SPORT: Are adjustable, which means that you can influence the behavior of the car to meet your preferences (ride comfort, handling balance, etc.).
Koni North America - ITT - Sport
http://www.koni-na.com/cat_search_form.cfm
Why the industries first adjustable shock is still the best:

• Big handling improvements
• Reasonable ride quality
• External rebound adjustment on most cars
• Best KONI shock for all lowering springs
• Re-buildable and re-valveable for custom vehicle setups
• Yellow exterior finish
• Lifetime Warranty

And
Intrax Coil Springs:

MakeModelYearPart NumberTypeChassisFrontRearLbsList PriceChryslerCrossfire V-604-28.1.025SLS
1.4"1.6"
variesThese Springs Are Cold Wound To The Most Exacting Standards, Stress Relieved And Shot Peened To Remove Surface Imperfections Extending Service Life Up To 200% Or More, Springs Are Also Phosphate Coated For Corrosion Resistance And Powder Coated To Ensure A Lifetime Of Outstanding Looks, Includes Manufacturer's Limited Lifetime Warranty
Intrax Suspension - Products - Springs