- The user recognizes easily the buttons .
- The buttons are marked with Braille letters.
- The “piano” keys have triangular shape and therefore the keys are bigger and can be pressed easier.
- The navigation between controls and menu is pretty intuitive.
- The cover is designed for this application only (it can not be used in other contexts).
- Because of the small size of the screen it is hard to not press by mistake another key.
- It doesn’t need any additional hardware.
- It is not required to have a previous experience with the piano.
- It is the less intuitive idea for the final user because this changes the usual way of playing the piano or any other device which replaces the piano.
- It might be pretty hard for the user to get used with the controls and it is very likely to confuse them.
- Due to user’s disability and the fact that the musical notes are represented as vectors (vertical, horizontal and diagonal) it is hard for the user to know the right direction.
- It is the most intuitive because it preserves the original way of playing the piano.
- It has the simplest menu (it only has the keys from the fingers and one above the hand).
- It can be used anywhere.
- It requires additional hardware.
- Each finger is pressure-sensitive and, if you touch a hard surface it will act like you pressed a certain piano key.