I have used this keyboard and here is my experience with this keyboard after using it for almost 4 and half months to the extreme.
First thing first, the feeling. This keyboard is not that much tactile and sometimes you just can’t feet the bumpiness of the keystrokes. Long typing sessions on this keyboard is not a go.
The space bar could have been longer to provide better resting position to thumb but its not an issue. This connectivity range lies just where all normal bluetooth keyboards are.
The keyboard is not user-friendly and you might doubt yourself for buying it as it does not worth your money.