Being a university student in the science field it is critical that I bring a calculator with me to all classes and be prepared to do various calculations. I bought the Casio because a friend recommended it to me. He said it was the most user friendly calculator he had ever used and it had all the functions that I would need to do the equations properly. As soon as I bought the calculator it was easy to see that my friend was right. Without even looking at the owner’s manual I could easily figure out how to do all the various functions. The 2 line display allows me to see what I numbers I have punched into the calculator and if a mistake is made it can be fixed without punching in all the numbers again. The scroll feature lets you go back and forth, fixing any mistakes you made. Also it runs on battery but also solar power which allows for a very long battery life. If the 3 years I have used the calculator I haven’t had to replace the battery once. One of the greatest features is the slide on case because it protects the screen and the buttons from being damaged while it moves round inside your backpack. Overall the Casio is the perfect calculator for what I need to do and I wouldn't hesitant to recommend it to someone else.