Wanted to order me this mouse as a remedy, but ATTENTION:
It's really only for NORMAL - big hands!
For me (w / 164cm) she was too big, thus it was inadvertently back into a complete malposition with the torso / shoulder / arm. Say: Thus it has completely missed the mark for me.
Too Bad :-(
Otherwise, I can imagine that it does a good job. From the feel OK, and is still a small fix-connected "pad" doing what you can to take the hand - also think that is very pleasant.
Conclusion: For larger hands recommended for smaller not. (I, however, no alternative. After all, the other vertical mice from the competition as the anchor are much worse in terms of size of hand ...)
So it is now diligently with daily Dehnübernungen the arm muscles. This really helps the way in the long run! Stay tuned, even if it sometimes does not hurt today ...