Bought lens for approximately two years ago, but recently sold it for the benefit of the Canon EF-S 55-250.
The sharpness is really good if you compare with other tele-zoom in the same price range, however, need to stop down to f / 8 from about 200mm focal length.
Vignetting is insignificant with the APS-C format.
Its strongest card is the picture tab, which like many others pointed out, the nearest is magical.
Unfortunately, the lens really shitty saturation and contrast, giving boring and beigedaskiga images (which, however, can be adjusted with software or pol.filter)
Then I want to create images without post-edit to any great extent and not lose brightness when using pol.filter, was purchased as written, Canon's EF-S telephoto zoom, which has significantly better color and contrast, weighs less, and has the unusual property of being sharpest at the longest focal length. Canon's product vinjetterar be more, but in summary, meets my criteria it better.