Plug&Play : DON’T NEED the extraction of drive-key from the original firmware of drive on your console, only install the chip and the "unsigned" firmware on-board will be boot .

Firmware-drive UPGRADE: you can use an upgraded firmware for better performance of your dvd-drive to reading dvd-r DL support( ex: you should use on LG/Hitachi the firmware vers. 059 instead your original 047D or 46D).

Electronic Switch ON/OFF : enable or disabile the chip when turn-on your console by power button, you can check the state of chip by a led-indicator .

Easy Reprogrammable Flash eprom: the on-board flash eprom is mounted on a socket connector for an easy and clean remove in order to fast reprogramming it.

COMPATIBILE whit ALL DVD-drive on the market (LG e SAMSUNG).
High reliability through ACTEL cpld technology.

Source

Ok, I have not been paying to much attention to the xbox 360 scene. Sorry if I sound like a noob..

Is this mod worth getting if it not really changing the bios of the xbox? Is it possible for microsoft to change the formating of the disc so this does not work anymore?