The first impression was very positive. Everything is very carefully processed, it loose nothing and feels nothing at cheap.
The form is nothing special but it is still far better in the hand than many others. I would compare it with the Roccat Kone roughly. Except for the pages. At the you have to really get used to. But after a short time you can appreciate it.
Quite convincing here the weights system. It is relatively easy to shift the focus. That is definitely an advantage over all the mice I have had so far.
So, now to the purchase criterion why I ever decided to use this mouse, the Keramikgleitfüße:
I wanted to ceramics since the Teflon but wear out and scratched after a certain time.
The feet can be easily change but at first I did not really cope with it. The gliding characteristics are somewhat different. After I got used to the mouse, I could make friends with it and now I'm completely switched to ceramic.
Some is the cable too stiff. But this is nunmal so on nylon sheathed cable. We ordered a cable routing to and it feels like cordless)
For Software
At first you could see the "back" - and "forward" - button. Do not turn off on the right side, I'll be there come more often on it, but now the bug has been fixed ...
The driver was okay. Because I've seen definitely worse. And running under Win7 and Win8 without problems.
You can create 5 different profiles and change using 2 buttons on the mouse.
Even macros are relatively easy buildable. However, I do not use it and therefore can not really say anything about it.