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This calculator is as capable as any out there. Nice big screen, bigger than the CX models. Long battery life, which is not true of the CX version. I'm very intrigued by the alpha keyboard between the other keys, which I find easier to use for programming than the tiny keyboard on the bottom of the CX. However I unintentionally hit them when trying to hit the number keys, particular the X when I intend to hit zero, so entry requires a more precision. I also prefer the clickpad to the touchpad that they went with in subsequent models. Only other major issue is that the font is pretty faint, and playing with the contrast doesn't seem to help much since darkening the screen makes some shaded portions too dark. Overall I think it's a great machine, and given the going prices is a deal compared to other models.Read full review
Verified purchase: Yes | Condition: Refurbished
Product and calculator is as mentioned. Very useful etc. however the calculator definitely does not seem to be factory refurbished or tested or anything. In fact, my calculator did not even come reset! I could see the whole history of the previous user's calculations. Also after checking on the calculator, looks like the calculator I got was almost 5 years old! While this is not a complete deal breaker, just be aware that you will be getting a calculator with clear signs of use with no warranty for very close to the retail price anyway. So I would say that the value isn't great, I'd just go with buying one brand new. Additionally, while the description states it comes with the software needed to connect calculator to computer, it doesn't provide any activation key or such. It does come with a CD but in 2019, who still has a computer that has a CD slot? (I have a Mac and Macs haven't had a CD slot for almost a decade by now). So I cannot comment on what the CD offers.Read full review
Verified purchase: Yes | Condition: Refurbished
Even ebay, doesn't know which one is which calculator, as I see the picture of non-CAS calculator associated with this item. CAS vs non-CAS... FUNDAMENTAL DIFFERENCE. CAS calculator can do a lot of math symbolically. What that means is that it can solve equations with variables in them, it can do all the algebra for you. It's truly something else. That said, there are also 3 versions of the Nspire CAS calculator (as of 2013), there's original "click-pad", the upgraded "track-pad" (you can guess the upgrade), and the new one CX which has a color screen. I personally don't care for the color screen (actually it's the terrible battery life that bothers me). I've had all versions, and surprisingly I prefer the original click-pad. Trackpad is overrated, and very often is in the way when it accidentally starts "tracking" when the user is just trying to use the D-pad. The older version is more like a calculator, trig functions have dedicated buttons, and the keyboard is arranged in a more familiar fashion (except for the alphas keys sprinkled on top of the calculator buttons). The alpha keys are strange at first, but they're very easy to get used to. The color version is just like the track-pad version, except that it has terrible battery life, and a color screen. If you really want your calculations in color then I guess there's no stopping you. The CAS is defintely much better than on the ti92 series (89, voyage). It finds more solutions to many problems (throwing complicated functions at the "solve" function). The other thing worth mentioning is that this calculator is more like a real OS in its usage. You can just grab it and use it (like ti92-series). You must create a document to which you must add a calculation tab (or you can opt to start with one), or a graphing tab, spreadsheet tab, etc. It allows you to organize your problems/subjects into separate/independent documents, but sometimes it's a little frustrating when you just want to multiply 2 numbers, but you're faced with trying to figure out how to get a calc tab. There's a "scratchpad" calculator and graphing available, so that's the universal calculator space equivalent to how ti89 operates all the time.Read full review
I have been searching for one of the keypads for a while now, that would be offered for a great price... what I got instead was a better deal for three different keypads, including the one I wanted. The only thing that would've made this better, was if I could have been able to have the option to buy the one I originally wanted by itself for a good deal, instead of having to buy all three. Cons of Packaging: Items were shipped in an envelope. What's wrong with that, some of you may ask? I just wish that each keypad had been safely and separately wrapped in bubble wrap, that way none of them could risk damaging the other during travel. However, my keypads did come undamaged, so I wasn't upset or anything. Overall, great product for a great deal!
Verified purchase: Yes | Condition: Pre-owned
Bought it for a differential equations class. It has served me well. Advise: I would consider how far you are going in math before you buy it though. If you are not going very far the fact that no one can help you is very off putting when a TI-84 and 89 will do just fine. But if you are going for the long haul the investment is worth the initial suffering because this calculator is really the best model that I have found. It excels at virtually everything. Bad: It's so fancy that no one else can help you do things with it. Usually google and the Texas instruments website is all you need though. It is also so good, that teachers usually do not allow it to be used on tests for Calculus and below. Good: Great rechargeable battery, I dim the display to the lowest setting and it lasts at least a week (I use it virtually all day). It can handle variable input, putting in x+y doesn't phase it, while the non-CAS nspire cannot accept undefined variables. It can graph anything I ask it to (3D included) and the screen resolution is great. Color screen is definitely better than the Ti 84 and 89 display. Can be programmed to do almost anything but I am having trouble figuring it out. Has a touch-pad mouse and many keys and operations are done like a standard keyboard computer. It really is like a little computer and the only thing that I have found that gives it trouble are slope fields. The calculator does them just fine but while they are being displayed most other operations are slowed.Read full review
Verified purchase: Yes | Condition: Pre-owned
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