Im sure they are high quality products, but they simply don't work on the F10 M5 for me. Much too aggresive and takes away every bit of class the car has.
Unless you want a show car to take to Sema and other shows alike, this is a huge waste of money as it takes the sexy sleak M5 and turns it into something it was NOT designed for..
DISCLAIMER: I am a huge fan of modifying cars, especially M cars but this is just too much. Perhaps the M3 is still a better candidate for this kind of treatment.