all the sat nav is displayed on the touch screen so it's only the MFD displaying a copy of the screen that's missing - which frankly i don't miss at all as I rarely had the MFD sat nav showing (normally on mileage etc.)
The sound is way better than the oem system, everything seems incredibly clear yet really 'bassy' if you need/want it. At high volume it out performs by a mile, you really can notice the difference and I didn't think it would be that noticeable but it is.
The graphics are a bit '80's' to be honest but since I have the sat nav showing 99% of the time (unless watching videos) it's not a problem - I will look at skinning it at some point but I'm in no hurry.
By the way if I didn't mention it before - I will now, the video quality is immense.
All i need now is to learn how to hook up the wireless camera