It's unfortunately rather small, Z7 buffer is apparently around 23 images and I think that is 12bit. Z6 there is a lot less info on.This quote is hidden because you are ignoring this member. Show Quote
Positives seem to be the AF, ergonomics (possibly the first FF MILC that actually fits an adult's hand), the Z/F adapter, and DPR (god I hate their clickbait-style news articles) is claiming it's the best EVF they have ever seen on any body. The EVF also does not drop refresh rate or resolution at any time, unlike Sony. Both Z6 and Z7 have AF down to -4.0EV which is pretty amazing for OSPDAF.
Negatives seem to be the single card slot (not great for wedding shooters), AE (not AF) is locked on the first frame for the fastest frame rates, 12bit only for fastest frame rates (not an issue above ISO 400), and buffer size is small compared to their DSLRs.
Z6 will do 12fps 12bit, 9fps 14bit with AE locked, and 5.5 FPS with AE between frames. AF between frames for all though. Z7 will do 9fps 12bit but 8fps 14bit with the same AE caveats.
Overall pretty awesome for the first iteration of a product at least at first glance, but I do think they missed the mark in a couple areas especially with such glaringly obvious targets to beat (Sony A7 III for Z6 and A7R III for Z7). The system has incredible potential tough. We knew it had a 54-55mm mount months ago, so that opens up some unique lens possibilities which they seem to have delivered on.
Super impressed they released a lens roadmap though and the Noct lens to show the market they were serious. Typically Nikon is horrible about announcing their intentions and giving people long-term confidence in new systems from a marketing perspective.
F/Z adapter will be discounted if you buy it with a camera.
The long rumored 500/5.6E VR PF also looks like it could be a game changer for some.