I bought it for a test, I got more than I expected for its price (in comparison with native glasses and Sigma).
Large aperture, good sharpness, and allows you to shoot at a fully open aperture.
Nimble autofocus. Good constructive, completely metal, including a hood. It feels more solid in the hands than native Kenon glasses in plastic cases. It's a pity that, for some unknown reason, eos-m only comes in silver.
Of the minuses - quite a lot of chromate on the open (corrected in the editor).
A…