Here the explanation of Loriano about the keyboard:
"The reason I chose this keyboard and 'that has more' or less the same finish of the case and also 'cause it's cheap, it is £ 9-13.
In addition, I can easily remove and place on houses without keys fall and then secure it from behind, so the case absorbs the impact when the keys are pressed.
You'll understand the solution when you'll receive it".
However people already complain about the high cost of the case, adding a more expensive keyboard would have been lowered the request of buying