1. Unfortunately, kt can't read documents, charts and the like. A document of A4 size is reduced to 6 inches, which is very difficult to read. For scanned A4-sized PDF, Kt is even larger. It's not that the format is not supported, but that the screen is too limited.
2. Yes, and it's very simple.
3. The reaction speed is OK. It is said that the CPU of kt is 800 MHz and the DRAM is 128 MB. I have seen tens of megabytes of cartoons in PDF format, and the pages are very smooth and not stuck. Kt will be used more and more slowly, mainly because there are too many books. As long as the factory settings are restored, they can be restored as usual. Of course, you need to make a backup, otherwise the book will be lost.
The official said that half an hour a day can last for two months. But I don't think it can be achieved, but 15 days or so is no problem.
5. Fully competent. Especially after the firmware is upgraded to 5. 1, the Chinese display is perfect. And it's good to finally be able to display horizontally.
To sum up, I feel that kt is mainly used for reading and pushing, but it is not competent for documents, charts, periodicals and magazines. I'm going to start the next generation 10 inch kindle, if Amazon launches it.