I had bought one almost identical to this for the Galaxy A8 and, just like the aforementioned one, it left me very satisfied!
I bought it for my son who is a student and needed a case with a keyboard for his studies.
The volume, as I mentioned in the corresponding review for the A8, is negligible as it is 2 in 1 (case + keyboard).
The keyboard is quiet and connects without any difficulty.

I have had the product for 1 month and the keyboard is truly terrible. I wasted my money, as some keys stopped working from the first few days and some keys work without being pressed. On the other hand, I wouldn't say that the case is commendable, but rather mediocre, as it makes the tablet appear bulky and heavy. Because I am cautious with the product, I constantly protect the tablet from falling, resulting in it never having fallen down for me to test its durability. Therefore, the conclusion is that the keyboard is extremely disappointing... and the reason for the rating is adequately justified.