Logitech k360 wireless kb&mouse slow and unpredictable; using Linux Mint 14 Mate running newer hardware builds.
Keyboard in not responsive at times and slow to get characters to appear on monitor. sometimes moving or liftine keyboard gets the data to go yet sometimes some characters are missing. I have replaced batteries and that improved the situation a little for a while. There's about six feet distance between dongle in PC and KB/Mouse with a wooden desk, cabling and monitor in between. Seems like when using kb&mouse constantly decreases the frequency of problems greatly. starting to uses them and infrequently using them seems to be when problem is most noted. I'm clueless....other than thats just the way it is and Windows 7 seems to have the same problem from what I read.
Maybe it's f_____ and needs to be warmed up with hours of foreplay...

A few things I noticed with my wireless keyboard/touchpad combo:
With a monitor between the receiver and the keyboard I could have some problems -- putting the receiver on the end of a USB extension cable so it could sit at the side of my monitor helped this.
The keyboard "goes to sleep" to save power after a few minutes of not being used -- to wake it up you have to press a keys or keys twice with a short gap between them (I use Ctrl, Shift or Alt for this so nothing is typed to screen when it wakes).
Very occasionally the keyboard or trackpad will seem to stop working completely an I need to reseat the batteries for the connection to re-establish.

Shhhhweet, Ahhhh lakkkkz dat idear!!! %))SW