Since today I'm a happy owner of it
bought it on Aliexpres when it randomly appeared on my screen during 11.11 sale.
I'm really positively surprised how nice it is.
To begin with, the device require a decent ambient light. I have a light meter UT383 so I can give you more precise numbers.
Today was a cloudy day so my room wasn't particularly well illuminated but I definitely could read a newspaper, a printed one, enjoying my morning coffee. The device however was too dark to read comfortably, I had to keep it vertically parallel to the window to have a good easy to read view. The light meter read ~50 lux.
Next I switched on a desk lamp but honestly I couldn't find a way to position the screen towards the lamp in such a way to have it well illuminated but without strong light reflection from the screen surface. (see the video 3 posts above mine, that's what I'm talking about)
However with my regular ceiling light it's quite okeyish to read on this tablet, but definitely better when I stand up. Seating the light meter reads ~110 lux, standing 160 lux. I'm going to improve my room lightning.
Outdoors the light meter measured ~1500 lux and the screen looks absolutely awesome in such lightning condition.
With good lightning conditions I really love to use it. It's easy to read like an e-ink but it's fast. That's the perfect device for reading! Sure, reading books on e-ink is really good especially novels because you read them forward only. I use my Onyx Max 2 to read technical PDFs and sometimes I'm upset how slow it is to flip between pages, especially when going backwards. However browsing web or using Max 2 as a monitor, nay.
The background of the display is kind of creamy-grey color, however the contrast is really high. The letters feels crystal clear. In fact I'm surprised because technically the resolution isn't super high, but again I'm happy with FullHD on 14" laptop, it's perhaps similar ppi.
I've spent quite a time configuring it, throwing all the built-in apps into a "Garbage" folder, installing F-Droid to get a bunch of apps like OpenBoard to begin with, installing Bromite browser, and all seems quite good now.
I also have the pen but honestly don't have much use for it. I have to look for a reader app similar to the one on Onyx Max. Speaking of which, I tried reading some PDFs, it's not bad despite only 10" when you can instantly zoom and rotate the device.
In summary, it's going to be my number one device to read daily news from the web, but it's quite possible that I'll use it more often than I imagined. Max2 is quite cumbersome to carry with you so most likely for reading on the go I'll use this tablet from now on.
UPDATE:
It's been a few days I'm having it. There's only one shortcoming which I noticed using it more often: the screen doesn't have excellent viewing angles in every direction. The excellent viewing goes in the direction
- landscape: front -> bottom (i.e. camera on top)
- portrait: front->right (usb socket on top).
The other two directions have ~30º viewing angle above that the screen is loosing contrast.