This is a great classic TI calculator. I had the same one years ago in high school and I remember it just the same. The design is good, with buttons clearly labeled and accessible. There are so many functions of use for the 84-plus, and I am still discovering more every day. The reason I gave this 4 stars instead of 5 is because I find at times the display is difficult to read while graphing. I knew there was a color edition which has a much nicer display, but the $60 price difference convinced me this one would be sufficent and it is. I recommend the 84-Plus for everyday graphing calculator needs.