When I setup my HTPC my existing wireless keyboard worked fine from the easy chair but the mouse did not. On a quest I went to a local computer store and told the guy what I was doing, ie a HTPC that needed to mouse from a chair 10 feet from the PC. While I was looking at all the wireless keyboards and mice he scurried away and came back with the Lenovo unit. When he pointed out it had a trackball and keyboard in one unit I said for that price I will risk it. What a great unit, perfect for surfing, pointing and clicking, typing usernames and pws. I still keep the big wireless keyboard on hand for serious typing. If only it were backlit it would be perfect.
For $30 it's a great little device, decent range, just don't expect to be able to use it in a dark HT environment (at least not as far as the keyboard goes). The trackball is very loose and takes some getting use to, I used one for about a week in my HT and returned it but at $30 I may order another one as a secondary control in my media room.
* Ordered one for $32 shipped, not too shabby, thanks for the heads up CajunCanuck .
** Something to keep in mind is that their processing/shipping appears to be pretty slow, my estimated ship date is 8/12 after ordering on 8/5 (so even though it said allow up to 5 days for processing and shipping, before I placed the order, they are actually estimating up to 7 days after the order had been placed). Then their free shipping is up to another 5 days added onto that. Not complaining at this price, just a warning, don't be in a rush for it .
*** My order shipped on Monday 8-9-2010 and is to be delivered on 8-12-2010, it does say signature required (so something else to watch for).
**** As of 8-10-2010 the code is still working (just a heads up).
I have one, and thought I wouldn't say it is fantastic, it basically does the job. Biggest flaw is lack of backlight (I wonder if you could just throw an small LED back there or something? I have no clue how you would wire that though) and as someone mentioned, keys are not the most responsive. Also, I sometimes have a double click issue happening with the left click, which can be very annoying. I think it has to do more with interference of the signal more than anything else, though.
This one is the old version, and it goes regularly on sale for $22-$25. I have one, and it is ok.
The new version, with backlight, is considered better (based on reviews), and goes on sail for $32-$36.