I have used it quite a lot already and it's pretty good. It certainly understands me with my distinctive accent better than the Mercedes understood Clarkson's 'normal' accent on last Sunday's TG. I've paired up phones, made calls, changed CD tracks, tuned the radio and fiddled with the climate control without any problems. I also like the 'help' command which gives you a list of your current options (incase you forget them) without having to consult the manual. For example, if you flick the voice button and say help it tells you your options include 'climate', 'cd player', 'phone' etc. then once you select one, let's say 'cd player', you can say help again and it'll list available options at that stage of the menu system like 'shuffle', 'play track #' and so on. Very handy when you're on the move and reading the instruction manual is out of the question. Demisting via voice control is excellent too. Instead of turning several dials and pushing buttons only to have to do the same in reverse once the windows have cleared I just flick the voice button and say 'climate', then 'demist on', then a few seconds later 'climate', 'demist off' and the job is done without taking my hands off the wheel or my eye off the road. This is the first car I've had with voice control and I have to say I'm more impressed than I thought I'd be.