It depends on what you are planning on using it for/studying. (Granted, it is fun to play with.) For abstract/pure math, it would not be so useful as it can't do the proofs for you (and, it would be hard to learn much if it did, anyway). It is rather useful for advanced physics, though. Certainly, there are a lot of other things it is useful for, but whether it will be useful to you depends on what you plan on doing.