I received this mouse a few days ago and have nothing good to say about it.

As you can see, you hold it like a Wii Nun chuck- buttons on the bottom, and a navigation ball on the top.  The concept is great, the reviews seemed okay, but nobody told me the thumb-controlled ball was sticky and non-responsive.  First of all, you have to understand that I use a trackball mouse on my desktop (previously posted image) and it will fly from top-to-bottom, left-to-right, and all over the screen.  Flip your thumb and the ball has a lot of “give” (if that is what you call it).  Nonetheless, the fish mouse ball is its major problem.

I probably won’t return the mouse anytime soon.  I’m thinking about using grease or graphite to get the sticky rollers working better.

So if you are thinking about a hand held mouse, then stop already.  The whole reason I needed something like it in the first place was for my laptop.  I actually changed my opinion on the mini-mouse and bought one for about $30 that works wonderfully.