I wanted the calculator and got - the calculator ;-)
And which is exalted by my previous impression of a doubt. Although he requires minor changes to the input behavior (if you previously had only something like a TI30xx), but this is actually an advantage because mathematically correct.
Personally, I like the design of the Mark - series very much, but objectively speaking are key with "distance" certainly better - especially when they are so tightly packed. But I already knew and have decided nevertheless for the design. In my case, the eye expects halt with ;-)
From me anyway a buy recommendation.