"Great for double-checking work, but don't get this for a math student as it may be forbidden for classroom use"
(South Carolina, USA)
I love this calculator, but I use it as my BACKUP calculator for studying.
If you are studying Algebra or Calculus, I suggest you get a non-CAS calculator for your homework and for use during quizzes and tests, but if you want a fuller understanding of the material, use the CX CAS for additional study in your subjects.
My main calculator for doing homework is my TI 84 Plus CE graphing calculator, but there are other good choices. Using it forces you to learn the material better.
The CX CAS model allows you to cheat, which is why I recommend you only use it for double-checking your work after you do it.