Only the one of Pinnacle Peak through the trees is wide open, the rest are stopped down like normal. Overall I don't have a ton extra to say that existing reviews haven't already said. It is a great lens at an excellent size and weight.
I also shot this timelapse with it to see how it did at night, overall it was excellent, very sharp and good control of aberrations. Link, and attempted embed below:
A1, so around 50 mpix.
Sharpness is amazing, no matter if upclose or far away. I'd say the contrast is also strong, reminds me more of Zeiss lenses then GMs...