The Itsakey's price is a very reasonable 14.99, which could buy you a more powerful USB flash drive, but at that price range, most consumers will be more attracted to the Itsakey's design and solid build. For an extra nine dollars, the 4gig hard drive can be doubled to an 8 gig one, pushing the Itsakey above the 'cheap usb-key' level, but still keeping it a very reasonably priced 'designer' model.
The Itsakey has a higher priced sister model, the Iamakey. While the prices of the two are actually quite close, the real distinguishing feature of the Iamakey is it's slimmer frame and lighter weight, which comes at the cost of requiring a plastic cover for it's connectors (as well as a few extra dollars). The differences between the two products are completely exterior, the electronic components of both are identical.