I like the thrifty Mice

I like this trackball mice and always saw her, my wife does not like the. For me, this is "not moving" on the missing Mousepad an essential criterion. It is simply more economical in space and more economical in "movement needs", and with a little practice you are also faster.
The 4 keys lasssen program over "Setpoint" from Logitech, and "auto scroll" and "Universal scroll" is (mouse wheel). With me Setpoint runs in the 4 version, the newer versions of SetPoint who I did not like ..... (again so pimped with all-time Internet connection and so crap ..... and then for larger and deeper in the system .... what shoud that ...).
Of course, I realized that so ne gepimte high performance mouse with 120 keys can be more, but who needs it, I do not.
I like the mouse well, and compare them with their predecessors well, compared to the very early generation there are now 4 buttons.