Originally Posted by M3 Montreal
Drove my fiends new 535 M Sport with start/stop and it was quite smooth as long as you're not flooring it when the light turns green.
Maybe the N55 is smoother to start than the N20? I wouldn't mind using it all the time (find myself being rather thrifty with gas these days), but the abrupt restart is simply too distracting.
The car I drove was a 2/2012 build.