Never mind what on-line reviews say, or what pixel-counting posters on this board say (including me). It's just hot air. Check the images in the lens sample archive - they are worth a thousand words.
MOST IMPORTANT: Find a camera store that lets you try before you buy. Does the lens work for you? If you really hate changing lenses, it might. Is it easy to use? Does it feel good on your camera? Are the pictures it takes sharp? Contrasty? Well exposed? How's the bokeh? If you like the lens and can afford it, buy it. If you don't like it, don't buy it, and keep shopping. The pictures you take are what matter.

