Just got the software installed and I would say that it works as advertised in the 15 minutes of testing. Normal now feels like sport mode and sport mode now feels really good. I also have the Dinan springs and higher speed turns in sport mode are now really crisp.
15 MB E63S AMG
14 BMW M6 Vert - Alpine White & Full Sakhir Orange. Comp Pack, Executive Pack, Driver Assistance Plus, B&O & 343M Wheels.
14 MB GL550
14 Porsche Boxster S (Gone)
12 BMW 550i xDrive - Dinan Stage 5 (Gone)
13 Infiniti JX35 AWD (Gone)
07 BMW 550i (Gone)
09 Hyundai Genesis 4.6 (Gone)