I think this will be huge once the bugs get worked out.
I compare this to a car rental experience. Once upon a time, I had to wait in a line at the counter, wait while they filled out a bunch of paperwork / completed a bunch of screen prompts, then I would finally head out to my car. Now I just walk straight to my car, get in and go. On trips where time is limited (which is pretty much every single trip I make) those extra few minutes saved are a big plus to me.