My main requirements are:
- I want to read mainly PDFs (tech books, papers, etc.) without having to zoom in/out (which is quite slow in e-ink readers). So, the size of the reader matters (the bigger the better, but not that big!)
- I want to send my PDFs without having to rely on any "cloud app/platform" provided by the company behind the e-ink reader. The ideal way would be to simply connect the device to my laptop via usb, and either drag and drop or just "cp" my files into the device. The second ideal way would be integration with standard platforms like google drive/icloud/dropbox
- I want to read outdoors
- Decent battery life
- Decent weight
I don't care much about taking notes.
https://news.ycombinator.com/item?id=23735962
I've been using the Onyx Boox Max 2 for a couple years and it's a pretty good device. When I purchased it they stated they would update the Android version, but they never did so it's stuck on Android 6. For reading PDFs it's good and there aren't really any competitors with this large of a screen. I'll often read books in dual page format, or read manuals in single page.
The device crashes frequently if you try to use any third party apps, and the pen has major lag if you're not using their notes app. Don't turn on the wifi or else the battery drains extremely fast. Make sure you don't leave it charged overnight or else the battery might balloon and explode. When this happened Onyx replaced my battery for free.
Despite these shortcomings, it's still better than the Sony digital paper (which I've also used and sold). The pen is pressure sensitive, which isn't in the Sony. The writing experience is worse than on the Remarkable, but Onyx has a bigger screen.
I'd recommend Remarkable if the screen size is good for you. The software is a lot more stable and the device is a lot more polished in general.