Top critical review
4 people found this helpful
3 years on
on 10 December 2014
I regret buying this calculator, it is awful. (I purchased it hoping it'd help me check answers when I was self-learning A2 further mathematics, I went on to do every MEI maths module, that's 3 A-levels and am now doing a maths degree and physics/engineering studies as a hobby, THIS CALCULATOR HELPS WITH NOTHING)
You would think "700mhz chip! More than 64kb of ram! Colour screen!" this should be the best calculator ever right? WRONG
It is unbearably slow, always and it has poorly written software (I speak as a programmer) I shall back this up with an example:
You're plotting a 3d graph and it already lags when you rotate (by 0.3-0.5 of a second easy, without upping the resolution of the graph grid, and with only one plot) that lag persists when you bring up a range dialog (the range you want it plotting on), that's right, it redraws every frame, so changing the scale of the plot is difficult and slow, it's awful.
You would think it'd render the plot and let you move the cursor over it and change stuff, redrawing as required but no, so it is not usable.
It is marketed t schools and JUST sticks to the adverts. One of the examples it touts so strongly is the ability to translate graphs by clicking and dragging, the example in the manual is y=x^2, it can ONLY translate this graph, it wont do y=x, it wont do y=x^3, it will only do that "you can move graphs!" thing the marketing touts with the example used in the adverts.
The CAS is .... hit and miss, you can't specify that something is an integer so it'll leave it in the form you input it, suppose you want to specify a>1 and a<2 say you have to write that using the not-qwerty tiny-buttoned keyboard coupled with the great lag of the screen.
You can't edit expressions and recalculate like you can with every other graphic calculator I've ever used, you have to go up, copy it, paste it into the next input and make your changes.
When it graphs it will try to write the "y1=[expression]" if you use a long expression and want to hide this you have to find it and alt-click it, this sounds easy but it redraws EVERY frame remember, so the lag makes it so difficult to do this, this pain is also present if you want to add a second expression to be graphed, you type a character, it lags redrawing everything, then you type again, and this wouldn't be so bad if the keypad wasn't so awful, but the tiny buttons and hard-to-memorise shortcuts (you have to try, because the catalog lags badly) make his such a nasty task.
It is awful at stats because of difficulty entering data (lag between selecting cells in a list) it doesn't buffer input, so you have to wait for it to catch up.
I paid a lot for this calculator and I try to use it but 3 years on despite my efforts, I hate it, it is useless at algebra and it's difficult to get it to fallback to numeric methods. It's so laggy that exploring menus is horrible. The programming feature is the worst I have ever seen, no calculator has great programming facilities but this has the worst, it has useless error reports and a really weird style. The tutorials (found anywhere online) are short and not complete because even the author gave up.
STAY AWAY FROM THIS CALCULATOR - also it's not allowed in A-level exams because it cannot be easily cleared, even though letting you use it in exams would be a punishmen.