I ordered nor quality batteries Eneloop equal to the mouse, thus the mouse keeps loose 3-4 days in normal operation by (of course no 72h in a row!). Charging wired is quick and problemslos. Too stiff cable I do not notice, also no drops on the desktop when you plug in the cable. This is perhaps the first time so, in order to driver installation.
The software is certainly not exactly brilliant, but can be operated well eventually. Just looks plain ugly. The only drawback: it can not be the profile of the mouse to the computer store, immernur vice versa! This means that the memory of the mouse will be deleted as soon as the mouse with another computer using software to synchronisert (not simply pocketed. The profiles work great as long as you want to change this is not "foreign" to a computer with Logitech software ! Plug and Play funzt super)
Otherwise there are no shortcomings that sampling or radio communication relates. It glides on all surfaces super (on glass it funzt not), on a Mousepad (eg Steel QCK) goes even better.
I highly recommend this mouse to anyone who wants a convenient cable-free, pleasant mouse with well-positioned modifier keys!