I received mine a couple of days ago and briefly tried it on two successive days walking home from work via City Hall in Philadelphia, the first day with it attached to the Sony a6000, the second to the Canon SL1. Here are a few photos from each day, mostly within parts of the building. All off-the-cuff, hand-held tourist-dodging stuff, mostly at 10mm, nothing fancy:https://www.flickr.com/photos/125326482@N07/sets/72157644720350428/
In some there's a bit of flare and ghosting (in a couple of the outdoor shots on the Canon the lens was aimed at the sun), some of which may be related to the cheap filter that Adorama threw in for free (I'll try it later with no filter and then with a better quality one). All are raw files processed via lightroom 5; a few had shadows lightened (the outdoor light was hideous each day), but otherwise the tweaks were minor.
I'm amazed by how little distortion the lens creates - most of the time I saw nothing that needed correcting, though just for the heck of it I applied the lens profile for the 11-22mm EOS-M (it worked better than the profile for its predecessor; there's no profile for the new lens yet, of course). It's miles better in terms of distortion at 10mm than the 24-105L is at 24mm, for instance, and better than any other similar wide-angle lens I've tried (if my memory is right, that is).
I included a few Sony a6000 photos to show the far-corner vignetting I mentioned elsewhere. (Aside from that vignetting - which only shows up at 10mm, varies with the light and often disappears completely with minor distortion tweaking - I'm inclined to think that the photos it makes on the Sony are on the whole slightly better when viewed closely, but it would take controlled testing to reach a firm conclusion either way; I'll leave that to someone else....)
Anyway, make of them what you will....