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Customer Review :
Not user friendly : Texas Instruments Ti-nspire Graphing Calculator with Touchpad
I believe Ti is simply trying to do way too much on this calculator. The device is intended for demonstrating mathematics to a class. However, to simply have a device on your desk to solve problems, this calculator is far too tedious and time consuming.
The touch pad is beyond frustrating and far too slow even after you have become used to it. Sometimes the cursor seems to disappear and takes fiddling to find it again. Many calculations use a template in which you must use the cursor to navigate inside boxes to "fill in the blanks" with needed information. Some examples of features that use templates are limits, derivatives, and summations. Ti is using these templates because, it seems, they didnt want the user to have to remember the necessary parameters for these features. The problem is that navigating in and out of all the small boxes you must fill in is extremely slow. You are constantly typing something where it shouldnt be and you must back up and correct a typing error. Some of the boxes are very small and require a high level of concentration to simply maneuver into the box correctly.
To add to the frustraion, many features are buried deep in menus. If you are solving a problem that involves multiple uses of such a feature, you must navigate through the menus multiple times in the same problem. A problem involving several uses of a statistical distribution or the combinations formula comes immediately to mind.
As far as the graphing is concerned, the graphs are prettier than previous versions of Ti graphing calculators. However, graphs on this unit tend to get cluttered and you find yourself having to use the "grab and drag" feature to move information to an area of the screen where you can read it. And, as I have alluded to earler, the "grab and drag" can be an adventure, and not always a good one.
Another feature that many may find annoying is the layout of the keyboard itself. Placing two functions on the same horizontally oreinted double length key slows down typing speed. For instance, multiplication and division are on the same key; multiply is on the right, divide is on the left. You simply type which side of the key you want. But each side of the key is too small. Ti had to make the keys smaller because they seem hell bent on keeping the "alpha" keys seperate from the other keys. Ti believes users would rather have seperate alpha keys so that the user does not need to press an "alpha" key to use a letter. But the sacrifice was not worth it. A seperate key has always been devoted to x,n,t. The user never needed to press "alpha" for those, anyway. How often do we really need all the other letters on a seperate key? The result is an entire keypad with buttons too small to easily use, especially with large fingers.
And one final gripe: Changing from degrees to radians is a common thing. Sometimes students need to change more than once within a single assignment. Changing modes requires going to a settings menu and actually tabbing through an entire document. Then the change must be made "to all documents" It takes over a half minute to make this change. DO you think this would be maddening to a user? I think so.
In summary, this calculator is just not practical. Ti had some good ideas, but the execution is just lacking. A person well versed on this calculator and the Ti-89 will be able to solve problems much faster on the 89. And to be honest, none of the Ti's are as quick and easy to use as the Casio graphing calculators. Casio understands "ease of use" FAR better than Ti ever did. The Casio Prizm, for example, is an oustanding calculator.