I have an E2 M4. I haven't gotten to use it much because of Covid, so I've only shot 2 small interviews, and a half dozen "walk around outside" tests.
The minimum setup is a CFast card, battery, lens, and phone. That's how I use it on a gimbal (I mentioned my setup in my post here). If you use it handheld, I would get a handle for each side. With a wide grip, it's very stable. There are some nice grips with control functions, but they are expensive. I would say that no matter what controls you use, it won't have the speed of a DSLR or cinema camera with more buttons and better ergonomics. It's not designed as a run and gun camera.
The image is very nice. There are lots of examples on the fb group, and I can shoot stuff if you want a specific test... likely limited to nature shots though. I wouldn't say the image its necessarily better than other cameras in the price range, though I like the color, high frame rate, and codec options. The app and the OFX plugin really set it apart from competition.
Some gotchas you will want to check before purchase:
- some Android phones just don't work with the app. I'd ask in the fb group for your specific model, if that's how you plan to use it.
- Timecode is a pain. You need 2 separate adapters. Or, you can set it over wifi from a jquery post (work in progress but it does work). Internal clock is atrocious, I got seconds of drift over a 20 minute period compared to the Zoom F4.
- Viltrox adapters don't work with many Autofocus lenses. Their support told me they don't support the M4... despite supporting the E2.
- It doesn't play nicely with the Ninja V. YMMV. Also saw some reports of it frying the HDMI port if connected to specific models of monitors, when both are powered from the same battery.