Also the tracking ball

I am Wirtschaftsinformatiker and got through the work with normal mice or the touchpad pain in the upper arm and tension get in the joint. I've got this mouse and after a short learning period, I got along well with them. I can keep them as I want and the service works with a little practice, the operation is very fine and precise.

If I had the review a few days ago written, I would have given 5 *, but now (after about a month) become unresponsive the tracking ball at once. Since I am not the first person who has the problem, which is probably really a weak point in the mouse. 26 should bring a solid quality. If it is running, the mouse is great, but apparently she has quality problems. Dear 5 expensive and it reliably.