A semi serious tool for learning the piano?

Really? Are you serious, a two octave plastic non-piano action keyboard? Perhaps you can also learn to play guitar on the PS23 with Rockband.. I'm sure it's fine for picking out a tune, but I spend too much of my life explaining to parents that the £99 Argos casio keyboard they bought their kid for Xmas is not suitable for learning piano on.. In fact it's only suitable for learning the casio on...