Just installed this in my GTi. Used the fitting kit from Dynamic Sounds.
I also have a MFSW and can confirm the with the kit from Dynamic Sounds, I have the following functionality:
Volume controls work
Star button is almost a mute button
Phone button seems to pause music
Ok button seems to change modes on the unit
Arrow buttons skip tracks
The MFD ( I have a high line MFD) only displays the word "Audio" though which is a bit disappointing, but I wasn't expecting much functionality there to be honest.
More functionality on the wheel that I thought I'd get so pretty pleased.
Not pleased with the facia however.
It's mottled plastic rather than smooth, fits well though. So just need to find a facia that matches the sash and I'm a happy bunny.
I also added USB sockets in the blanks next to the ESP and tire pressure buttons, but the unit only reads my iPhone as an iPod and won't activate CarPlay, it has to be a genuine apple cable direct from the unit it would seem.
I'll post some photos up later today