I bought this calculator back in High School about 6 years ago and have not regretted purchasing it ever.  It is a great calculator, which is the proverbial truth that it takes a licking and keeps on ticking.  The only  reason that I mention this is that calculators take really large beating in  backpacks and this specific one handles those very well.  In the 6 years  that I have had this calculator it has worked flawlessly and I have taken  it with me to collage, where it is serving me very well.  I would very much  recommend this calculator to anyone that needs a graphing calculator.  It  does not matter if you are in high school or collage.  It's a great  calculator.  Further more unlike some of the other non-TI calculators and  even the TI-86 and TI-89 this one is very easy to learn and use.