I've seen Angie at least 25 times, always by appointment except for the 1st time. I've never had to wait. Well, one time she completely forgot the appointment, but she made it to the spa in under 15 minutes. In my experience, once you've seen a provider a few times, they're not going to risk annoying a good customer by giving away the appointment time. If the appointment was made by a random phone number they don't recognize, then, sure, the bird-in-the-hand may win out.