If you get the one with the unterminated power/data cable, you could wire that to your own serial plug with pin4 as power and you'd literally have a single-plug solution. Nifty.

If the GPSapp software proves useful to me in the long run, I might have to save up for something like this just to get the fast aquisition times.

They don't seem to clarify the difference between the high voltage and low voltage models, though.