Autofocus: in three weeks of shooting with it I can’t say that I ever had an issue with how the lens responded to the camera’s focus system. Because the 70-300mm is a native CX lens, that means you can use all of the focus sensors on the camera, not just the central one as happens when you use a traditional F-mount lens on a Nikon 1 via Nikon’s adapter.
It’s a shame that the V3 has an indirect way of moving the focus point (press OK button, then use Direction pad, then press OK again) and a potential direct way that isn’t really usable when you’re using the EVF (touchscreen). If you’re using the LCD to focus, great. Otherwise, you’re slowed by the method of moving the focus sensor, which takes away from the speed at which the lens actually focuses. Another of those design dissonances in the Nikon 1 line, unfortunately.