I've been looking for a decent external hard drive for quite some time, one which wasn't plagued by dodgy software which tried to make you use it in a certain way, unlike that you just plug it in (format it to NTFS if necessary) and then simply drag and drop the required files. Aesthetically it looks fantastic, by far the best looking, sleekest external HDD on the market, and due to its size I leave it plugged in on my desk, and it takes up virtually no room at all. It has a quick transfer rate, makes minimal noise and doesn't seem to overheat as do some other external hard drives, and I leave it plugged in all the time.
My PC is only a 40GB Dell from 2004, so I needed a lot of extra space and this did the trick, I have a entire backup of my system files and documents, as well as storing about 200GB of films etc. with a large 300GB left over for further expansion.
Perhaps the only minor inconvenience is the fact that the drive is pre-formatted to FAT32 (meaning you can't store individual files of over 4GB on the disk, such as films)however there is a very simple step by step guide in the form of a PDF document on the hard drive which you can follow. After formatting to NTFS I had 465GB of space left, so it's about 35GB under the stated amount even when completely clear with no partition but its no major problem.
Overall a great hard drive, which lets you use it how you like, perfect for back-up and storing the large media files which we all have today.