I don't have, but have driven the Boss,s Audi V8 Sports, he told me take for a drive once a Month, and wow is that thing scary.
0-100 in 3.1 seconds.
I know I tried
Anyway Alex that is getting away from your question it has a display on the screen straight in front of your eyes and can be a little distracting if one is not used to it.
Other than that one never has to look down to look at the speed, it dose it's job well.
Leon
