Awesome providing your camera will autofocus it!,
This review is from: Nikon 50mm f/1.8D AF Nikkor Lens for Nikon Digital SLR Cameras (Camera)
Heaps of people love this lens, quite rightly its sharp, lightweight and low in distortion and is F1.8.
However I found it a pain to use on a D40 just a quarter of a turn to focus is not enough when you are taking pictures of close-in subjects. It will annoy you! On the D90 it's fine!
However the biggest minus of them all is how unuseful a 50mm lens is on a DX camera i.e. a fixed 75MM is quite long, especially after using the kit lenses which are 18-55 for the D40 or 18-105 for the D90. By all means get one but like me you'll wonder if you should sell it to a mate (where I got mine) as well as I took it all over the World and only once put it on the camera!
The same can be said of the 35 mm AF-s DX though this is strictly a low light close in lens in my opinion and not as good as the 50mm by any chalk though has a built in motor.