Amazon Customer Reviews

I love the calculator, it's only real downside is the fact that the letter size in display is pretty small and not adjustable. Only took me a week to shift to this system from TI-83 Plus.

This calculator will do any and everything you need it to do.
It takes a bit of learning to get the full use of it, but after that you're good to go. I wouldn't buy anything less than this product.

If you only use Mac OS, do NOT buy this calc if you plan to update the calc or upload new programs. It does NOT work and Ti has failed to support the last 2 versions of OS X.

I wanted a calculator that could help me in my math pre-reqs and not break the bank. Campus bookstore was asking 249.00 for a used ti-89. The Target Store was asking 149.00 for new. My gently used, with new batteries, was around 80.00.

The Ti-89 is way overpowered for a simple class like Probability and Statistics or College Algebra. The Windows like interface makes it so easy to use. The other people in class will be waiting for their calculators to show the answer, while you are 2 problems ahead.

This Ti-89 did not come with a book or cables, but a trip to Best Buy and a local printing shop cost me 15.00 total to fix that.

You have to spend some time in general figuring how to set your parameters and understanding how it functions. After that, you're going to be very happy. In my experience you can count on figuring this out yourself, as my professors use the Ti-84 series for classwork and did not have a good grasp on the more advanced Ti-89.

Having used a scientific calculator from high school to 4th year in college, this made my life so much easier when solving difficult/cumbersome statistics and engineering problems. Not exactly the easiest calculator to use (why one would need to read the manual to make full use), but by comparison to scientific calcs, it's worth the time to learn how to use.