This review is for the Samsung - Book Cover For Galaxy Tab A 7 - Black. I've only used it for about a week, so this is a limited use review. I can't speak to long usage. It has worked well and fits very well.
However, it is not as stable as some other book stand type covers I've used. The magnet is not as strong as it could be, and when I swipe to turn pages or move the screen while in stand "mode", it sometimes falls over. I don't feel that I'm pressing too hard because the Kindle app page doesn't turn if I press more lightly.
It appears to protect the device as well as any of these rubberized covers protect, and I like that it closes over the entire device. It does flop open if turned upside down, and doesn't have a strap to hold it in place, but works well in general