Ow hell, I just realized you were asking about the lens, and not the birds, lol.
I didn't get anything fancy, I got a refurbished Nikon VR DX 70-300mm, f/4.5-6.3.
I got it to replace my ailing Nikon VR DX 55-300mm, f/4.5-5.6 kit lens. Overall I have been very happy with the performance of my kit lens, but it was cheaper to buy the 70-300 refurbished from B&H, then it was to get the sticky AF repaired (by Nikon) on my kit lens.
One of the advantages I like about the new lens is that it has the pulse motor AF system, and is super fast and quiet. It also allows manual manipulation of the focus ring, even in auto focus mode. The old lens has Nikon's silent wave motor design. It is far from silent, is slower then the newer style. It does not allow manual manipulation of the focus without going into the camera set up menu and completely turning off the auto focus motor.
But with that said, it was the old lens, and focus system that has worked so well for me stopping fighter jets speeding along at 600mph +. So I guess we will wait and see,