I bought the Lenovo mini keyboard/mouse to use as a remote with my HTPC, after a few days of use here is what I have decided.....
First of all the tracking ball is too light on its feet. If you try to operate it with one hand you end up moving the mouse while attempting to click the button. Which moves me to my next complaint; as others have mentioned, the left/right click buttons should have been placed underneath for the nice video game "trigger" functionality that we all love so much. Also the unit is extremely light, which makes it feel like a kids play toy.
My biggest problem is the range. I have my computer mounted behind an LCD on the wall and sitting about seven feet away I am constantly fighting for signal. To make matters worse the keys are tiny and the unit is not back lit, so navigating in a dark room is pretty much impossible.
Despite my complaints, there really is not much else out there at this price point. I think I may take the advise of another review and just use my Iphone with the logitech app, which is far from perfect, but it is free. . Note: for 30 dollars the lenovo unit is fine, not worth 60 dollars though, wait for V2 with back-lighting and trigger mouse and bluetooth for added range.
I am also considering purchasing the Logitech dinovo mini, which runs about $120, or the gyration air remote