Positives:
(+) This mouse is comfortable,
(+) It is relatively easy, as only a battery in it,
(+) And it is pleasantly quiet. Not silent, but pleasant.
Negatives:
(---) This mouse has gone me 2x broken within 6 months. The first time I thought it was random, the second time exactly the same spot was affected. The rubber on the mouse is released and thus can be hardly used the mouse. (I do not have very large hands and my ring finger is on the joint)
(-), The battery needs to be changed about once a month. The receiver is only 50cm away and there are no obstacles in the way. A much too short life!
Conclusion: The mouse breaks regularly and eats a lot of power. Hardly recommended for regular use. Too expensive for such a short shelf life.