When I got my TI-85, I was just entering my Pre-Calculus class in my sophomore year at high school. I played around with it for a while, just to get the feel of how it worked, because I got it from an older relative who was not going to be using it anymore. I used it for about 3 years before it had an unfortunate death, well technically it still works, you just can not see the answers because of a broken line right through the place where the answers are shown. But enough of how my calculator is at the moment, lets get to pros and cons. For me, it was very easy to figure out a lot of the basic functions of the calculator, being graphing, computing, fractions, decimals, but thats the easy stuff. Imputing numbers and symbols on the calculator was very easy, and I prefer the way that keyboard was set up compared to some of the calculators these days. The only Con I would have to say is that its old, and because of that, you can barely find it anymore nowadays.