We were impressed with the Little Big Disk's performance. The LaCie Little Big Disk was one of a very few external drives we've tested that offers consistently similar write and read speeds. Using a FireWire 400 connection, it averaged about 9.5 minutes to write our 10GB test folder to disk and copy it back to our PC. If you have a FireWire 800 port, you should see even faster performance. However, even using FireWire 400, the Little Big Disk was already the top performer among the external hard drives of its physical size (or bigger) that we've tested. Audiovisual pros, in particular, will rejoice at the drive's blazing speeds.
We tested with the FireWire connection because the USB 2.0 connection isn't bus-powered; it requires the included power adapter, which makes the unit a little more cumbersome when on the go. The FireWire connections are bus-powered. This is the only technical complaint we had with the drive.
The LaCie Little Big Disk is a bit pricey for the capacities offered, but it is an excellent external hard drive that offers great speed, multiple connection options, and features, including as RAID 0 capability, not normally included on drives of this size.