3 of 3 people found the following review helpful
4-and-a-half star calculator from Casio,
This review is from: Casio FX-991ESPLUS Scientific Calculator (Office Product)
This is pretty good calculator, that is let down by its 'toy plastic' construction and cheap-feeling keys. If it weren't for these, it would definitely be a 5 star device.
I have this and the Sharp EL-W506B. In my opinion, the Sharp has the edge on the Casio as not only is it faster, it also has more features, a clear screen, and (as far as my needs go) more logical layout.
However, this is a review of the Casio, so this is where I find it trumps the Sharp...
1. The Table feature - this is an extremely useful and powerful feature that lets you solve functions of x - f(x). This is completely absent on the Sharp.
2. Extremely fast solving of complex formulas involving integration and differentiation.
3. A dedicated ANS key.
4. A recessed screen. This may not seem important but it adds an extra degree of protection to the screen and prevents it becoming scratched.
All in all, this is a great calculator and you won't regret buying it.