The mouse is very comfortable to hold and react very precisely. The software installs quickly and well the possibility of keyboard and mouse to be connected to a receiver (Unify) is great and works perfectly In the beginning there were problems reaction. This was but the fact that I had the receiver to the rear USB port on the computer under the table. Since I work in an open plan office and all colleagues Funkmäuse- and keyboards, it came here to disturbances. With the included USB extension the problem was solved quickly and the extension together with receiver is now on my desk under the monitor but where it does not really stand. Only the multi-called battery power may just wish to remain in continuous operation. Here was my previous Logitech Wireless Mouse far more power. Although man is warned when the battery runs out. But it does not fit then the battery is very quickly completely empty. Then it is, connect the attached charging cable and on we go. The charger I leave permanently in the socket, I can also charge it and my phone Samsung (or iPhone via adapters) can use. Mostly I charge the mouse overnight. Except for the low battery power a very strong buy recommendation.
