I had it on my previous 550 and I loved it. The tune is designed to maintain the OEM power delivery feel. It still feels like a 550 just faster and more effortless.
It is like BMW should have designed the car this way in the first place.
It's a must in my opinion for any 550 owner.
2014 Porsche 911 Turbo S
2015 Mercedes C300 4MATIC
Memberships: BMW CCA, Peachstate PCA, NMA, AAA, RAC
2015 Jaguar F-Type R
2014 BMW M5 Individual Dinan Stage 1
2013 BMW M5 Individual
2012 BMW 550i Dinan Stage 2
2004 BMW M3
2001 BMW 330Ci
1997 BMW 328Ci
1994 BMW 325Ci