Hi Mark,
As Colin says, to fit as per OEM you'd need to either cut a hole into your exisitng parcel shelf, or use the one included in your kit - but with that you would need to then install the blind. I have the tourer system in both our cars, intergrated with the BMW set up. There is a little modfication needed to sat nav loom, but there is an intergration being done at the upcoming midlands nano meet.
To me having had 2 cars with and 2 without the difference is massive, especially when driven by a BM24 or 54 radio module. The sub infairness is less intrusive than most!