Summary: Useful, big enough to read pdf's of books that have never been made into e-books - this was the primary reason and it serves it well. I found it too slow to use it to annotate anything, perhaps future iterations will be more responsive. Battery is really weak, lasts much less than a week.
Summary: This appears to be a re-branded onyx boox m92 with some functionality removed like web browsing. This product should work fine but the screen is very delicate so you must be very careful with it. Good luck.