Logitech cordless (that came with the c-less keyboard), which I was warned about and have had no problems whatsoever. Simple and efficient (for my textual needs). At first I thought the USB will be a pain in the youknowwhat, but attaching it to the mouse when taking the laptop somewhere reminds me to switch off the mouse, which makes the battery-thing really reasonable. Plus I switch hands, too, mostly when searching for something, and can scroll and click on different surfaces, not just the table (as a change for the hand and arm). Wouldn't imagine having a cord again.