I've been waiting for the G100 to be discounted. If anyone is aware of great discounts, please post - otherwise I guess we keep waiting. I'm excited to replace or augment my GM5 with a camera with a nice viewfinder and great rear screen, plus better ergonomics, but still relatively small and light. It's surprising the Panasonic packed such great viewfinder & rear screen into such a small package. I think the reviews were wrong - since they all focused on v-logging only. We seem to forget that Panasonic didn't have IBIS a while ago (i.e. GM5) yet the we managed to take great pictures with them, especially with stabilized zoom lenses. So I'm looking forward to G9 picture quality, in a great little package - but I was hoping for a darn discount given all the negative press.
Here in the UK, every retailer has also stuck closely to the suggested retail price (i.e. the full price) of the G100 in all its available packages (body only, body + 12-32, body + 12-32 + SHGR-1 shooting grip) except for Amazon UK, which currently has between 15% and 20% lower prices depending on the package - it's puzzling, as there it yo-yo's in price a lot, sometimes going back up to match everywhere else, and sometimes dropping even lower than today's prices - not always logically either, as sometimes the grip package has been cheaper than the body only! (I refer only to items sold by Amazon UK itself).
I went for one out of curiosity when the price plunged a lot at Amazon (I don't do much video so I am speaking from a still photography perspective). It's a nice little camera, a great evolution of the GM line (strictly speaking, more a development of the current GX800/880/GF9/10 I suppose, since it is polycarbonate-bodied like them, though it uses full-size SDHC/XC cards rather than the tiny Micro SD size that group uses) with the same unusual stepper-motor EFCS shutter of both those lines, with its inherent characteristics and what you could describe as limitations (top mechanical speed 1/500, top flash sync 1/50), EFCS-only when using the physical shutter. I'd say that strictly speaking, sensor-wise, it's more of a relative of the G90/95 than the G9 (which has an uprated AF system based on faster data throughput and so on).
The EVF is pretty large - I would point out that the description of it in reviews has been inconsistent; it isn't OLED as some sites suggest, but a new variant of Panasonic's sequential-field LCoS unit with higher resolution and a faster refresh rate (I can still see rainbowing but not frequently and I am quite sensitive to it, in the sense(!) that I'm able to notice it more readily than some can). Unfortunately the eyepiece optics aren't brilliant - there's an arc of distortion midway up both side edges if you don't precisely centre your eye, and I should also point out that the eyecup isn't actually an eyecup despite appearances - it's a fixed, hard plastic rim which is just painted with soft-touch finish (this is perhaps important to glasses-wearers or people who shoot in very bright sunlight a lot). Weirdly, I can always somewhat see the right-hand internal side wall of the tunnel between the EVF and the eyepiece, as it is illuminated somewhat by the light from the EVF panel (the opposite side, top and bottom areas of this are not). This is visible but not hugely distracting to me at all eye positions, in all lighting.
The G100 is very compact (slightly smaller and lighter than an Olympus E-M10 III/IIIs/IV for example). The rear monitor is good quality and the menus are full, not cut-down, with plenty of customisable buttons, albeit not quite as many as larger Panasonics. I haven't had much time to scrutinise its image quality but I see nothing to fall out with there so far. The rear wheel at the 4-way controller cluster is super-sensitive (more so than its predecessors I'd say) which could be viewed either as a positive or negative depending on your preference - it's great to have a front control wheel as well. It's a shame the IBIS is gone, but with OIS lenses there isn't a huge difference and the shutter is very low-impact of course (and no-impact with electronic shutter). The G100 uses the GX80/85/9 battery, which is fully compatible with the charger supplied with the GM1 and 5 (assuming they had chargers supplied with them, I don't remember - but their thinner battery does use the same charger anyway). In typical modern style, the G100 doesn't come with a separate charger. Its built-in flash operates via a manual lift-up by side "ears" on the flash housing.
All in all, a nice little camera - slightly unremarkable in a way, but pleasant to use and usefully compact and light for those that want these qualities.