Features:

• Extraordinary capacity - With up to 1.5 TB of storage in an elegant, small footprint design, you have plenty of space to store an entire digital photo library, your HD movie collection and hours and hours of DV video.
• Extra data protection - For extra data protection, dedicate half the capacity for mirroring and automatically and instantaneously back up data every time you save it.
• Extra-fast performance - The lighting-fast combination of FireWire 400/800 and RAID striping yields the speed you need for fast, smooth video editing, an extra-responsive Photoshop scratch disk, and rendering complex 3D objects or special effects.
• Easy to set up, easy to use - You're up and running in a few simple steps. RAID configuration is easy with WD's intuitive RAID Wizard software.
• Triple interface - Provides flexibility and performance with connections for ultra-fast FireWire 800, as well as FireWire 400 and USB 2.0.

Editor Reviews:

Product Description:
Formatted for Mac, the WDG2TP15000 MyBook Pro Edition II triple interface dual-drive storage system offers RAID mirroring for extra data protection or RAID striping for extraordinary capacity and performance. A triple-interface and a powerful combination of features and performance make this system the storage solution of choice for creative professionals, workgroups, small offices and anyone looking for extra assurance that their data is safe. With up to 1.5 TB of storage you have plenty of space to store an entire digital photo library, your HD movie collection and hours of DV video. The lighting-fast combination of FireWire 400/800 and RAID striping yields the speed you need for fast, smooth video editing, an extra-responsive Photoshop scratch disk, rendering complex 3D objects or special effects and saving huge blocks of data in record time. System Requirements - Available USB Port, Mac OS X 10.3 or later, Windows 2000, XP or Vista Dimensions - Height 6.870 x Length 6.270 x Width 4.09 inch Weight - 4.25 Pounds

Rating : - Extremely fast and reliable drive
I ordered this drive a few months ago when it was on sale for well under 300 dollars. There's a firmware update that's available if its noise bothers you. So far it's provided reliable service using both USB and firewire.