With this mouse, you can adjust the length of the mouse, as well as the thumb panel distance. So whether you are a palm or claw gripper, this mouse can fit your hand! You can also adjust the weight - up to five 6g weights can be added. The mouse has 3 profile settings that you can easily switch between. The R.A.T. 7 has a "precision aim" function which changes your DPI at the push of a button. This mouse can have DPI settings of anywhere from 25 to 6400 DPI.
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Pro Reliable; keeps on going through the years
It will still work just as well as the day you bought it.
Pro Incredible flexibility
Many parts of the mouse are adjustable with interchangeable pinkie grips and palm rests to a custom weight system. The mouse is able to literally change its size and weight.
Pro Cordless version available
It also comes in a cordless version, called the RAT 9.
Con Laser (not optical) sensor
Laser sensors are just not that great when compared to optical sensors. Often there is acceleration issues with laser sensors.
Con Expensive for what the internal hardware is
Sadly the components inside of this mouse are pretty cheap, ranging from the switches to the laser sensor. For the price Mad Catz is charging one should expect higher quality components.
Con Forward / back buttons wear easily
The two buttons located on the side of the mouse (sometimes known as the page forward and page back buttons for internet browsers) wear out easily after only a few months of usage. That means that it requires extra force to register a button press, all while receiving no touch (or audible clicking) feedback. Frustrating but the mouse does continue working.