I've had mine for about two years now and I love it. I liked it so much that I replace my mouse and keyboad at work with some logitech wireless ones out of my own pocket.
every so often it would have a screen to pop up and say CORDLESS SIGNAL IS LOW PLEASE INSTALL NEW BATTERIES. It would do this 2 minutes after I put in new batteries and continue doing it throughout the day.
I have the mouse and keyboard ($79 - on sale - I rock) and it's been a life saver at the office when I need more desk space I can just move the keyboard or if I have so much crap on my desk I can work anywhere.