« on: March 08, 2011, 07:22:18 PM »
Wasted your money, no. The lens you got is a fine piece of equipment.
For me, though, it would be the wrong choice. I like really sharp results, and often end up with less light than I really want. That happens frequently from indoor sports, to social events where a flash would be obtrusive, to dusk/dawn nature photography. Having the IS is the key to getting some of those shots when the lens is already wide open (or close), ISO is as high as I can stand, and the shutter speed is still on the low side.
I'll partially disagree with an earlier poster about freezing motion. IS won't stop motion blur, but it still helps to remove some of the other vibrations you get when panning with a moving subject.