The orientation sensor cannot be disabled, i.e. lying on your side will be inconvenient to read, the text will turn over 90 degrees.
It does not always work correctly, when you flip the text and continue the rotation of the book, it does not work, you need to wait for the current text rotation, and only then rotate the device further if required.
When opening large books (more than 5000-6000 pages), hangs are possible, reloading saves.
Traces of the previous text remain on the paper, before it did not come across electronic paper, perhaps the common problem of electronic books. When reading is not noticeable.
From pleasant
A single charge is really enough for a long time, more than 20 hours (if you only read). At 3000 leafing enough for sure.
When reading paper is similar to a real one, at first there is a desire to turn over like a regular book.
The correct (in my opinion) layout of the buttons is convenient to read in any orientation of the book, and the shortcut buttons greatly speed up navigation.
The screen update time is about 0.8 s, compared with the same ABC, the difference is noticeable and positively different.
Some pictures
Price
I took in Ukraine for 1,700 hryvnia, which is approximately 6,800 rubles.
Verdict
On the purchase did not regret, compared with the monitor more convenient at times. It is well combined with TraumLib FB2 on the computer. The side buttons are very convenient in front of the menu items; this was one of the main criteria when choosing a book.