Mario & Luigi is satisfyingly long for a DS game, and though there's no advantage to a second play, shaping characters' stats can make for different strategies. RPGs suffer from monotony, but M&L packs in what variety it can, with each special move being a minigame in itself and special game events offering interactive challenges.
The Mario & Luigi series has not yet broken the threshold to be equal to the Paper Mario games. Bowser's Inside Story comes incredibly close, though.
