Summary: Wow! This calculator took me about 5 minutes to figure out. It is easily the most user friendly calculator out there. I love that there are large, dedicated buttons for the most commonly used functions. No (shift+option+menu location+choice) to find what you're looking for on this calculator. The functions you're looking for are either on a dedicated button, or displayed as an option on the function row. It was a toss-up for me between this calculator and the Prizm.
Summary: Why? The main reason is that the TI-84 has a software defect that prevents it from graphing even relatively simple functions correctly - graphs are incomplete. So, if you want to spare yourself the embarrassment of being laughed at in class you should avoid the TI-84(all versions). The latest version of its software does nothing to fix the problem either.
Can't beat the price, and it's very easy to operate.
K. Susta "growing gnostic", Amazon
14 November 2014
Summary: Works great, easy to use, very explicit instructions. I love it! I've never owned or used a graphing calculator. I'm a 44 year old mother that decided to return to college. School is daunting, this calculator is not.
Summary: I have been exceptionally with the Casio USB Graphing Calculator. Unlike calculators by TI (which I've come to abhor), Casio makes a fine product that is relatively easy to use. I highly recommend this calculator.