I bought one earlier this year during one of Nikon's $100 off sales. Got it specifically as a light weight alternative to my 70-200 2.8 and for low light/shallow DOF. Here's a shot from a senior dog fund raiser a few weeks back at 1.8.
I shoot a couple of track events a year for the Porsche Club. I've gotten better at panning over the years. First shot is from last year
D7000 w/17-55 2.8 @ 1/80 sec. Second is from our Spring event this year D600 w/ 24-70 @ 1/80 sec.