I have it from the factory in my 2011 Golf. It's OK, does the job. Maybe less sexy than the 510, lower resolution and all, but a lot more reasonably priced.
That said... can you say "smart phone"? Or for a larger display, an iPad mini with cell data (need that for GPS)?
I'm going to have to replace the obsolete Garmin GPS in my plane pretty soon, and I think I'll just get an iPad mini with a Foreflight subscription for Canada, I'll also be able to cancel my Canada Flight Supplement subscription ($150 per year or so) and chart purchases at the same time, and also use it in the car(s).
I already use my iPhone as GPS in my wife's wagon which doesn't have nav. I also used it in the UK and Italy over the last couple of years and it worked great. My wife's car has bluetooth and the voice directions come over the bluetooth just great.
Honestly apart from the clean look of an integrated unit, I'm not sure why I'd bother to buy an in-dash unit anymore (or for that matter even a stand-alone GPS). Or even an aviation GPS (unless you need an IFR-approved unit and that's in another league, price-wise).