Sharp lenslets, sharp price, buy rating!

externally before nothing to complain about, processing ok ok optics, zoom pleasant, almost too stiff, bayonet fit.
Beautiful lightweight, but does not look like "plastic japanese"
AF: fast and accurate (no ultrasonic motor - therefore not exactly quiet, who's bother)
33cm focusing distance also be sufficient for beautiful macro, thanks to f2.8 in "passing".
Sharpness: The entrance pupil can use real !! no later than f4 (other catch as just soft on ..) everything nice crisp.
No deterioration of sharpness in the outer image.
Colors ok, almost no seams.
Stability is not missing you in light intensity.

My Pentax 17-70 draws here in terms of image quality significantly lose out.

therefore:
Heart what you want at the price more!