Ar Tonelico pretty much has it all. The story and especially pacing is fantastic; the music is truly special, the battles are incredibly engaging via the Revyatelis, and the art is simply gorgeous. [Feb 2007, p.36]
If you're looking for a light RPG, then Ar Tonelico: Melody of Elemia definitely fits the bill because it's cheerful, well animated and utterly predictable. Combat is a breeze, even if you're farming for items, and the plot is lackluster at best.