Released in 2010, this is - rather surprisingly, perhaps - the first lens in Nikon's 50+ year history which is this wide AND this fast.
The price tag means it's not intended for the mass market, obviously. But what you get for the money is a big, well built lens that delivers great images. The out-of-focus blur (bokeh) at f/1.4 is very pleasant. Some reviewers have determined that it's not tack-sharp wide open, and some corner softness is notable. But then, this isn't a lens you buy to shoot test charts; it's a lens you buy to get a unique perspective in your photographs. And it certainly delivers.