About two years after my first (positive) reviews for this product started the mouse to turn individual clicks double clicks. I got substitute a new M705, which initially also worked well. That was in July 2012. Earlier this year, in 2013 - I wanted it even hardly admit it - it went off again. The highlight of a sentence has not been possible and repeatedly came double clicks, which I had only just clicked.
The life of the mouse does not reach the rudimentary batteries, although I never power down the mouse. I have now written to the Logitech support again and I hope that the answers very soon. And I hope that the replacement is better.
Logitech: This quality you can win a potted plant!
Conclusion: Stay away!
And if someone was advised to buy because my first positive review, I ask sincerely apologize! mea culpa!