Now I looked at the mouse of Delux (but no cable) purchased. This is even to some extent better in the hand than the CSL, however, does not slip when you click through their higher weight and supporting the heel of your hand. I now use for several weeks and am excited still.
After 1-2 days of practice, the operation is also accurate. For the best accuracy, I had a little play with the mouse speed and other settings, but am very happy now. I had to admit a gaming mouse from Logitech and needs that this was still a bit more precise, but both Office applications as well as games (eg Borderland 2, Civilization) everything works very well.
The only problem in the mouse was that as a reverse button the lower thumb button and forward button was preset upper thumb key and no mouse driver came with. But according to an email sent to the German distributor of Delux, I promptly received a reply with the appropriate mouse driver. Now everything can be set great.
After several weeks of testing I have to say that I never want to use a conventional mouse. After testing many vertical mice I'm happy now to have found precisely the one that is both comfortable for the hand and precise enough for games.