Interesting, and definitely less expensive. But it also allows you to set the "preferred" pressure. I'm surprised it's not preset with the manufacturer's recommended pressure. And of course for us techies, we love to see data -- the more the better. I'd like to know if one tire is 38 while another is 39 (neither of them low). Also, when you put air in, you will need to be able to check the pressure with your own gauge again, rather than just looking on the dash.