Very good, but "only" the number 2!

I could not decide between the 991 and the Casio Sharp EL W 506, so I ordered both to compare - it can only recommend, because you have to get used to the operation already when the last TR 10 years ago bought and Sharp and Casio are yet different.

For Casio:
All repeat would sinnfrei because my predecessors have already made great work; the functions are known or to read from external sources. Only this:
I can only agree with the many positive recessions. He may possibly need, and a lot more than one. Even better and more can only programmable TRs and are often useless because not admitted in trials.

BUT:
the (mentioned several times) Speed ​​(both when moving the cursor, as well as in computing itself) has moved me to the Sharp EL 506 W. Who makes the comparison (eg. 69! Can be calculated in parallel by both parties) will see it! The Casio takes nearly 3 seconds at Sharp can not measure the time - the result is there immediately!
Would say, who for some time a newer Casio has and is patient to the Cas obsolete because the operation is then already familiar.
All Perfomance fanatics access to Sharp.

Otherwise, there are in my view two gleichwärtige Top TR for a real special price!