The device itself is as small as most USB GPS devices, and w/ it connected to the iPhone it'll be just as bulky as several handheld GPS devices. Plus, it's only as bulky as a current iPod FM or BT transmitter. I doubt people will have an issue with using it if they want it.
What I find interesting about it: you might be able to use it not only on the iPhone but on anything that has USB GPS support. Now if they somehow managed to add Bluetooth to it, then I'd buy it in a second. I think it's still worth it for iPhone and computer use.
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The device itself is as small as most USB GPS devices, and w/ it connected to the iPhone it'll be just as bulky as several handheld GPS devices. Plus, it's only as bulky as a current iPod FM or BT transmitter. I doubt people will have an issue with using it if they want it.
What I find interesting about it: you might be able to use it not only on the iPhone but on anything that has USB GPS support. Now if they somehow managed to add Bluetooth to it, then I'd buy it in a second. I think it's still worth it for iPhone and computer use.