Conclusion: I'm interested in pointing devices, and have rather a lot of them, including a collection of wired and wireless mice, Bluetooth trackpads, and several standard and thumb-operated trackballs. I loved the feel and features of my R.A.T. 7, but its inconsistent tracking led me to put it aside. Fortunately, the R.A.T. 9 suffered from none of the problems of the R.A.T. 7, and it's become my "pointing device of choice" for most day-to-day work, and certainly for gaming!
Pros: You can adjust and configure the mouse body for a perfect fit., Excellent, heavy-duty construction with lots of metal., On-the-fly selection of resolutions and modes., Instant responsiveness equivalent to the best wired mice., Easily swappable batteries; extra battery charges in the receiver., Precision Aim button!
Cons: Expensive mouse solution., Profile Editor software somewhat limited; must manually load game profiles., Profile data stored in the driver, not the mouse., No "free scrolling" option on the scroll wheel., Minimal documentation.