If you have a computer, which you must have to be reading this review you might want to attach other things to it. Here are some things you can use this cable to attach to your computer AND transfer information:
A printer (what I use it for, AND it's been working very well and has a good length so I can move my printer around and set it up in different configurations)
A camera (digital)
A hard drive (portable)
A palm pilot
And so many other things!
Now here are some other things you could "attach" to your computer with this cable, but they wouldn't transfer any information and would only be for the sake of attaching them:
A head of lettuce
A ball of mud
and pretty much anything soft that you can push the smaller end into.
So, in conclusion you can have a cheap and reliable device that can hook into the computer you clearly have and use it to transfer information!