I bought the lens 3 months ago @550 and didn't regret having that. I used tamron 18-270 vzd before. This lens is smaller, lighter and sharper, at least on the long end. It stick on my 7D for my daily use. It has macro mode, which I like very much. Sharpness could be similar to 55-250. I don't have that lens anymore so no real comparison. The problem is that focus is not very fast, and my lens does need -11 MA to be sharp.
Anyone have any experience/sample images with this lens? I know it is probably not great; but B&H has it on for $399 on sale. Thought it might be ok to stick on my 60D for when the family goes to amusement parks, zoo, etc, for when I don't want to change lenses or carry a large kit.
Thanks for your two cents!