Mad Catz has brought the wireless controller market from the Stone Age up to more current technological standards. The controller is by all means one of the most feature rich that you'll find for the PlayStation or PlayStation 2 as it not only features full 900 MHz wireless functionality, but it's also loaded with extra features like Macros and Steering Wheel play modes.
The most significant of all of its features is undoubtedly its 900MHz RF radio wireless technology, which essentially means that the unit is not affected by objects in its line of sight or otherwise -- unlike wireless controllers based on infrared technology. Because of this, players need not feel constrained by their wireless controller and can hold it at any angle and in any direction without having to worry about losing control over the game. In fact, the controller will even work if you're in another room -- however, seeing the television and actually playing the game might prove to be a problem in this case.
As far as the controller's other options are concerned, it offers a powerful macro function that makes it easy to program and later perform a predetermined set of directional pad and/or action button presses in order to execute special moves. It's very easy to setup even complex moves and there are even some cool macros detailed in the game's manual for Tekken Tag Tournament, Tony Hawk's Pro Skater and Mortal Kombat 4.
Other functions of the controller include the ability to switch from Analog to Steering Wheel and to Digital Mode with the press of a button. The Analog and Digital modes are the same as what you get with the standard Dual Shock 2, while the Steering Wheel mode tries to simulate the Negcon's functionalities.
While the 900MHz Dual Force is loaded with options and its wireless technology is well ahead of its competitors, it ultimately comes up a bit short when it taken as a controller on its own. While it does have a nice ergonomic design and feels very heavy and well built, it is plagued by an awful digital pad and analog sticks that feel a bit too loose. The d-pad, while nice and sturdy, seems to be designed more for diagonals than for straights as it can prove to be quite problematic in moving in any of the up/down or left/right directions. The action buttons and the shoulder buttons are all very responsive and feel nicely crafted.