CBP One Appointment Wait Time

The wait time may vary according to the location one is entering from. Although the process is smooth, for an appointment there may be long queues in advance. For example, at the US- Mexican border there is a rush of people to enter the US. Appointments here will fill up faster. So, the appointment wait there may be very long ranging from days to weeks. Although CBP One is working on it, it may take some time to fully expand the appointment dates. But other than this the app is working fine and keeps a smooth entry of people for appointments.