Bought this lens with a 50D body instead of going for the 50D lens Kit.
This lens has extremely good optics for the prices. The F/1.8 lens speed means that portraits look professional with very little effort required.
Focus speed is excellent and it is very light when placed on the camera.
Optics aren't going to be as good as its more expensive brothers, however, for those just starting out and wanting to learn about cameras and shot types I would strongly recommend adding this to your bag.