As said before, the top left of the device includes an interesting panel that lets you set Rapid Fire for each individual button. The Xbox Guide button is also located here, and there are also two switches. One lets you set the joystick to control either a digital pad, or either the left or the right analog stick on a standard Xbox controller. Frankly, I use that mostly when I'm navigating the menus in the Xbox UI, so I can scroll the text descriptions (which are scrolled with the right stick).
The buttons in the device are connected via quick disconnects, so if you'd rather use other buttons perhaps because you don't like the white and black / grey motif on the joystick, you can change them. Swapping the Sanwa JLF joystick for another joystick is also fairly easy, as it is getting to it so you can switch the Japanese ball top for an American bat top. Other modifications, such as removing the gate if it bothers you or adding an octagonal gate instead of the default square gate are also possible. Just be aware that all of those will void the warranty. Basically, this is a very friendly stick to those who like to mod them.
Also, because the Xbox 360 uses a standard USB interface, this joystick will work on PC's. Once plugged in your computer should recognize it as an Xbox 360 compatible joystick (you may need an additional driver, depending on your configuration) and you should be set to go.
Finally, Madcatz has been releasing slightly modified versions of this stick with different cover artwork. The functionality and the parts are the same; it's only the printed artwork, and in some cases the paintjob, that differ at all. So, if you see an alternate version with artwork that you prefer over the standard one, by all means go for it if you want it. Should be the same stick. Just don't confuse it with the standard edition; that one uses Madcatz instead of Sanwa parts. However, it is very easy to mod with Sanwa or Seimitsu parts, so if you're short on cash but want a joystick now and believe you'll be able to mod it with better parts in the future, by all means grab the Standard Edition.