i only have a few complaints so far
-it's difficult to switch lenses, according to the manual you need to remove the adapter with lens> switch lens on adapter> mount new Lens + Adapter on camera
not only is this annoying when shooting run n gun style, its also kinda hard to put the lenses on the adapter. the G lenses already are tricky to mount, the adapter adds to the complication.
-it can hunt in low light but i havent compared it to native lenses, i cant imagine its the same as a native lens, but either way the manual focus is pretty easy to use and slightly more accurate with focus peaking. (i mean i can see what its focusing versus a little green box on the chin or something)
-it doesnt read the F stop, so it wont tell me in the meta data later or give me a light read if im curious. you can manually change the aperture in camera to match but i find it to be a step i dont what to do because im so focused on making an image.
if you have the lens aperture set to f5.6 and ur camera is set to f8 it will read light at f8 which is annoying, i have to set it in camera at max and the cam then reads light as the aperture changes
let me know if you guys have any specific questions. this is just a quick evaluation based on a few weeks of shooting, im still getting used to it