I was fortunate enough to play with this lens on a Z9 and my own Z6 for several hours at a couple of nature parks this week. The Z9 is nice, but not wanting to change every setting of the owner, it was hard to truly put it through the paces. Though I don't think this is the lens for me, it was surprisingly the standout of the day, particularly on my Z6 where it seemed to do better than on the Z9, which is saying allot since it was doing very well on the Z9. Of course given more time with the Z9, I am sure it would perform bettter. But, iIt basically made the Z6 a brand new camera and erased any AF issues, I can only assume due to low power needs due to light weight everything.. The weight is just ridiculous, feeling more like a kids toy that can't possibly function, let alone function so well. Of course it is not light in the grand scheme, but the the overall volume vs weight has it feeling much lighter than it actually is, and the balance makes it extremely easy to not only point around, but changing positions on the lens is effortless, especially compared to my 200-400 vr which is like a weight lifting thrust sometimes to get my hands to a new spot. AF was fast and confident. Though minimal focus distance leaves a little to be desired, you can achieve complete bokeh wash that is very neutral and pleasing.