The Casio PX-120 Privia is a discontinued 88-key digital piano (circa 2007-2008) known for its portable, slim design, weighted scaled hammer-action keys, and Tri-element AIF sound source, offering authentic piano feel with 20 rhythms, layering, split modes, and recording, though its key action and effects are considered simpler than some competitors, making it a solid, affordable choice for beginners and gigging musicians seeking portability.