Definately not worth retrofitting. I have never used it in any BMW. It just doesn't work well, and by the time the system understands your command you could have entered it with the knob or buttons five times.
2014 Carrera 2S
- White/2 Tone Espresso/Cognac - Aerokit - PSE - PDCC - SPASM - PDK - Sport Chrono - 20" wheels w/OEM Spacers - Glass Roof - Leather Dash - way too much more to list
2013 E92 M3
- LeMans Blue/Black Novillo - Comp Package - MDCT - CW - PP - EPS - CF Roof w/OEM CF Mirrors, Spoiler, Interior Trim - Full IND package - Muffler Delete