So much better than my old TI-84 plus, and a lot cheaper as well. The casio can do everything that the TI can do and then some. On the TI you need to download special programs to do conics and to solve equations, but on the casio the functions are built in and easy to access. I actually find the interface a lot clearer than on the TI and don't get lost tryng to find certain functions. My only complaint is the lack of downloadable programs for it, but that's really not the calculator's fault. With the TI, you can fid countless programs, like riemann sum solvers, because TIs are more widely used, whereas it seems that almost nobody uses casios. However, other than that, the casio is by far my preferred calculator for my calc class.