This is my third Texas Instruments calculator.  I also have a TI-84 and a Voyage 200, both of which I love.  I bought this one because I needed a no-frills scientific calculator for my Diff Eq class.  I didn't have a lot of money to spend, so this one seemed to fit the bill.  I wish I had gone to a bricks and mortar store and tried it against some other ones, though.  It has all the functions I want, including storing the previous answer, but the buttons don't always register a key press.  It is really frustrating to be in the middle of a test and have the calculator get temperamental.  It is especially bad when I don't notice it happened and mess up a problem because the button didn't register.  It's not an issue with the buttons being difficult to press, either.  The button presses just don't get picked up some times.
This is my third Texas Instruments calculator. I also have a TI-84 and a Voyage 200, both of which I love. I bought this one because I needed a no-frills scientific calculator for my Diff Eq class. I didn't have a lot of money to spend, so this one seemed to fit the bill. I wish I had gone to a bricks and mortar store and tried it against some other ones, though. It has all the functions I want, including storing the previous answer, but the buttons don't always register a key press. It is really frustrating to be in the middle of a test and have the calculator get temperamental. It is especially bad when I don't notice it happened and mess up a problem because the button didn't register. It's not an issue with the buttons being difficult to press, either. The button presses just don't get picked up some times.