In have used Z7 a number of times.
Ergonomics were lot better than Sony.
The touchscreen is actually useful.
The AF needs a bit of improvement but there is a fw update coming with eyeAF.
They don't have all the lenses I want (but neither does sony) but there are some F-mount lens(es) I'd love to adapt like the 300mm PF.
If they do fix thier AF I may just swap over one day when its cheap enough to do so.
But if canon manage to fix their sensor and AF sooner I'd most definitely swap to canon. They already have glass sorted for me.
Bit of improvement
I actually bought myself a Z7, thought it might suit me having been Nikon for so long for personal use and would allow me to get some use out of the Nikon glass I still had at the time, I hated it and thankfully was able to return it, without having to take the hit on selling it on.
I second shot a wedding for a mate who was stuck after her second fell ill a few weeks back using her gear and used her Z6, found the a.f performance very frustrating and swoped to a D750 shortly after the ceremony which I actually thought was more reliable in terms of a.f especially in low light. So much for the Z6 being great in low light I thought it was awful, hunted like anything even using the 35mm f/1.8 S. She thought the same which was why she had palmed the Z6 on to me instead of using it herself.
Just my opinion of course, but they really aren't very good and that's not even comparing to the Sony's, they aren't even that good compared to the Nikon DSLR's.
They have miles to go before they can compete with Sony, haven't used any of the new Canon's so don't know how good/bad they are.
I was honestly surprised at how poor the a.f performance was on the Z's, they are okay in decent light, I had borrowed one from another friend previously for a couple of days when they first launched and first impressions was that they where okay.
I lent the girl I second shot for a couple of A7III's and some lenses for family mini sessions, Saturday before last. She brought them back to me the day after and couldn't get over the difference. She put all her Nikon stuff up for sale straight away but hasn't had any real interest in them at all. She is giving it another few days and then she is bringing the whole lot down to W.E.X to trade in.
The ergonomics are better though.
It's a council house camera at a Hollywood mansion price.