These are great HDDs. Seriously, I wouldn't change my mind on the brand. I don't have one myself at this moment, but my friends have them. They are nearly unbreakable, my friends dropped them on the ground for me from about 3 feet high. There were no scratches, or slow downs in the data transfer.
The reason that people would want one of these is because of on the go work. Like me, I do graphical work, so if I can't send a bunch of files through email (I do large work, so files are sometimes over 10MB a piece) I will store them on a hard drive such as this, and then take them to a printer or such.
Yes, also, one more thing to state, if you would look at a magazine article with all of the pretty colors and what-not, that page alone is about 10-25MB. The reason it is so large is because of the resolution that the editor is using. I myself use around 300 pixles per square inch. They probably use upwards of 500.