**Summary of review** This calculator is awesome, it has gotten me better grades on tests, it was easy to transition from a TI-89. I highly recommend this calculator.
I am going through the math sequence in college right now. I am in the middle of the 2 year Calculus sequence then moving on to Linear Algebra and Differential Equations so I needed something better then the good ol' TI-89 that had been my go to for many previous years.
I am very used to the TI-89 Titanium and was unsure if I wanted to take the plunge of buying and learning a new calculator. I am SO GLAD I decided to give it a try.
Nspire CX CAS compared to TI-89 Titanium
PROS: *Color screen and better resolution! (This is extremely valuable when graphing multiple equations or graphing in 3D) *Can graph in 3D and rotate the graph (The TI-89 can too, but it looks terrible and is not useful) *Has room for notes, you can write anything you want in it. *Matrices and cross products are way simpler and faster to calculate. *It can do almost everything! Derivatives, integrals, limits, sums, implicit differentiation, differential equations, Taylor polynomials, and so much more! *Rechargeable Battery? (I originally thought this would be a con, but I get 2-3 weeks of daily use per charge so its not bad) *Full alphabet keys (this proved to be so useful when you learn the calculator, you can quickly type in things instead of navigating menus) *Easy to transition to this from TI-89 (Just watch a few youtube videos and it is very easy to learn)
CONS: *The touch pad mouse is terrible (The four arrow box under the screen is also a touchpad, performs horribly, hard to use, hard to press the buttons without it thinking you are using the mouse and changing your selection. It is also hard to accurately use the touch pad to select things) *Rechargeable battery? (This isn't really a con unless you forget to charge it and it dies during an exam. I usually get 2-3 weeks of daily use per charge.) *Buttons aren't as nice to press as the ones on the TI-89. They require more force and you need to press them down until they 'click'. The 'click' is semi annoying when doing lots of calculations in a quiet classroom full of people taking an exam. Some of the buttons are multi-funtion and you need to press them just right, but its not a huge deal.
OVERALL: I love this calculator, there have been several occasions on calculus exams where I was stumped, spent some time roaming the menus and trying different things on this calculator and figured out the problem. I was not able to do that on the TI-89. This calculator has improved my GPA and it is great for almost all sections of calculus.
Whether you are just getting into math and need a good calculator or are looking to upgrade from a TI-83, TI-84 or TI89 I highly recommend the Nspire CAS CX