Super functions for Little calculator

My purchase decision was the following:
A desktop computer with large buttons, large display, all required functions and dual power operation with battery type AA 1.5V was just right. Most of the other computers have a small button cell which does not keep long, if the lighting is dim and the energy largely comes from the battery.
In terms of functionality, digit size in the display and key size and spacing was not disappointed.

However, I also found defects that devalue the unit considerably:
The most annoying thing is the stiff rubber keypad. As a craftsman you have a firm grip, but on this keyboard does even me after half an hour expecting the whole hand hurt! In addition, due to the sluggishness individual characters are not pressed properly so that you do some calculation again. (Design flaw made in China: The keys tilt sideways from the press, but this does not solve out!)
Display: The numbers are very large and kept clearly visible, but the symbols are out of proportion to. Whether the "M" on the content in the memory or the selected operation (+ - x :) are only about 2mm in size, at the very edge of the display from normal distance barely visible.

CONCLUSION: Who is strong and expects little in the office, which is well advised by the genius MTX 902. All others I rate a smoother table Recher.