I tried the Radtech, thinking it would be nice to have both USB ports available. But, I could never get the Radtech to move smoothly (or wake the computer from sleep, but that wasn't a big deal)---it would have a slight delay in movement, which resulted in constantly overshooting the intended position, or it would jump all over the screen. I used my Logitech bluetooth from my desktop to check whether it was the MBP, and the Logitech worked fine, but it is too big for carrying around. So, I stayed with the MS laser mouse on the USB port, which is smooth, fast, and accurate.
I might have just gotten a bad mouse, but it wasn't worth the effort to send it back to the US and exchange it.