Not perfect, but a lot of fun!

* Yes, you can discover CAs. On the D90 with the automatic CA correction but that is completely negligible, and also at the D60 disturb not really.
* Yes, it has some barrel distortion. In straight lines in the image it falls on already, but if you should actually bother times because of the subject, they can be completely removed with a very good image processing as PTLens.
* In some places a restless, unpleasant bokeh described. Mir is also noticed times, below the previously 1000 shots but were 1-2, which showed this phenomenon. The next screen in almost the same shooting situation, it showed but again not 'strange. This committee in the parts per thousand range I can still cope.

In addition, however one has to mention the immense fun that makes this lens:

* Very sharp images, good color and contrast
* Very bright. I could even in situations where my 16-85er lens would have done with VR already flabby, do not easily freehand shots.
* Thanks to the 1.8er Aperture is a great place to play with the depth of field, as you never with a normal zoom below the professional league could.
* The focal length is ideal and this lens is my new Always plan from landscape to architecture Portrait. Apart from my ultra wide angle and my macro lens for close range I have never taken it since the purchase.

Overall, therefore, a strong buy recommendation, it makes simply beautiful pictures is not too expensive, and I think it brings a vision and good to shoot in 'more than any zoom lens.