Installation was fairly straightforward, except the VW's non-standard wiring meant a wire had to be swapped to give it a permanent power feed (instructions online) and the aerial plug needs power supplied to it via an adaptor.
Why did I buy this model? Because it looks and works like a factory stereo. Big, clear buttons so you're not distracted from driving, and once you've used it a while you can operate it by touch without looking away from the road at all (try that with a modern touch-screen system!!).
FM reception - fairly poor, despite the powered aerial adaptor (its even worse without it)
AM reception - fine
CD - haven't used it!
Bluetooth functions - superb - both for phonecalls and music.
Sound qualty - really great - especially through the upgraded 8 speakers my car already has.
Usability - superb
Overall - 5 out of 5.