Almost total junk, Except the keyboard.

Returned this for a Logitech, if that tells you anything.
The keyboard on this unit is the best part of it. It has very quiet keys that have a nice action to them, and a solid feel.
The mouse however, is junk. Poor optical performance, coupled with a very sketchy receiver and a cheap feel and it makes for an unpleasant experience. That's the other thing, the receiver or transmitters in this set suck. It was always telling me I was out of range, when I was right next to it. No matter where I moved it I was always getting messages that the signal quality was too low. This I believe added to the unpleasantness of the mouse.