I think you should try one out. I personally disagree with most comments here.
The BMW nav is simple to use, doesn't distract you and 'just works'. I have had the 4:3 and now I'm on the 16:9 with MK4. I have owned Pioneer units (many and my last was the AVIC940), Sony units, and others.... They all have their failings!!!
It might be old, but that doesn't mean it doesn't work well
