(CASIO) Scientific Calculator (FX-991ESPLUS)

I can't complain about the functionality of this calculator. It does everything you could want from a non-graphing calculator. My only problem was that as an engineering student, I already use a TI-89 and an Inspire (which are already very different from each other), and so I was impatient with learning the new button/function configuration on yet another calculator. My daughter prefers Casios, and hates trying to figure out TI's, so I would recommend this to someone who plans to use it exclusively.