I returned my Apple Wireless Mouse just a couple of days after purchasing it. I found that whenever I had to pick up the mouse to reposition it (e.g., when I reached the edge of my desk), the mouse would click when I put it down. Apparently the extra weight is enough to click the mouse even with the "click resistance" switch set to the high setting. Needless to say, random clicks can get really frustrating.
I also tried the Microsoft Wireless Mouse for Bluetooth. That one had to go back as well because the cursor movement was *very* jumpy. It was nearly impossible to target small things on the screen accurately. Hopefully the Logitech bluetooth mouse will be better when it's released