I had gotten my first TI calculator in 6th or 7th grade. My TI-83+ has survived about 10 years of being dropped, thrown in frustration, left in hot/cold cars, etc. I bought this calculator for a finance class so that I could enter the calculations I need as they are taught in class rather than figuring it out on my graphing calculator. The first thing I noticed are the keys aren't nearly as good and are kind of annoying to press.  The case isn't very solid at all, I get the feeling if I were to drop it that would be the end of this calculator. As for actual calculation it has been fine so far, but you need to change decimal settings. Out of box it rounds to 2 places, which is inadequate. I recommend setting it to 5.