I would give it a 5-star rating, but the lack of mouse buttons makes it somewhat inconvenient. The mouse buttons are replaced with gestures, which fortunately I did not use on iOS because although it claims to be compatible (and probably is), the manual states that gestures do not work on iOS.
It folds up quite small and has (weak) magnets to keep it closed, so it is easily portable and fits in a jacket/pocket. The keys, due to their different distance from the keyboard, do not allow for very fast typing, but they are good and the typing speed is satisfactory. It connects instantly (after pairing) and I have not noticed any disconnections during use, although after a few minutes of inactivity, it goes to sleep and needs a button press to reconnect. The battery has a duration that allows it to be used without any problem for several hours.

It is quite good value for money and very convenient for my work.

Of course, I noticed from using it that sometimes it gets stuck in switching between the two languages.