Pros: Great keys and shortcut keys. Nicest feel of any keyboard.
Cons: Does not work with Win 7 x64 w/ latest Vista x64 driver. Logitech does not support Win 7. The Vista driver installs, but top window loses focus every 30 seconds, which makes it impossible to type. Same on different computers w/ different hardware.
Pros: CAN'T THINK OF ANYTHING THAT MAKES THIS KEYBOARD BETTER THEN THE LAST, CHEAPER KEYBOARD I HAD
Cons: THERE IS ABSOLUTELY NO NUM-LOCK WITH THIS KEYBOARD....IT HAS A BUILT IN CALCULATOR, AND WITH IT TURNED OFF YOU CAN USE THE NUM KEYS, BUT YOU CAN'T USE THE SAME KEYS AS ARROWS WHEN THE NUMS ARE OFF