It takes up the whole shelf, brings it level with the surround. Still leaves room for a soft bag on top if you're stuck for space, but frankly the boot is remarkable in it's ability to swallow luggage - I toured france for 2 weeks with my wife with just the stuff in the boot. Though she did have to leave some shoes at home(!).
Remote is IR, though I rarely use it, generalyl wait to swap tracks when I've stopped the car at the lights etc.
You could probably fit a small amp - or a sub in the space available - they are a clever lot at wentworth.
