Some beginner keyboards like Casio LK-240 or Yamaha EZ-220 feature light indicators on the each key that (I suppose) light up on the keys that currently must be pressed down. Is this technology efficient, and would it be a good idea to use such models as the first keyboard to learn?
From one side, this would probably help to understand faster which keys must be pressed.
From the other side, instead of developing skills required for normal playing, such device may just develop and perfect skills of following the lights.
Does anybody has a knowledge or experience with this lights-aided learning?