Have the D106R in the C4 with the solid state Satnav addon, imprint processor (actually a separate processor with this headunit, amps plug into the processor if you buy it) and 400BT Bluetooth addon. C4 has loads of room in the dash so literally all the addon boxes are behind or on top of the headunit.
All works very well together, no complaints at all.
If you want to see any videos of anything demonstrated give me a shout can sort some out for you. Can even point you to places so you can do custom background images. Uses an odd file format so have to play around a bit.
Do like the head unit though. I spend a lot of time waiting around for people, with appointments etc. So being able to watch a tv episode or film while waiting is brilliant.
Mine in my car,