I have this case, works fine. Technically, it is a hydraulic function, as the door speed is regulated by a fluid-based module. A somewhat cheesy set up, but it is functional, and you don't have to worry too much about black peripherals, the door covers the drives.
Oh.. and the thread title is horribly wrong, it is not an Alienware case, and it isn't "modded", it comes from the manufacturer that way..