These calculators are handy. I'm a math major and purchased this for a work related class, as they wanted to instruct on a scientific calculator, but not a fancy or costly one. I've been impressed and carry it around with me still. I have a TI-83plus and a TI-NSpire CAS, but this one still fits a niche. This particular blue calculator was a second purchase for my daughter for high school geometry class. She loves it.