It is good to use Appointment mode when you're scheduling the same type of events such as customer appointments, advisory sessions, interviews, etc. Appointment mode saves lots of time as everything happens automatically and your calendar fills up with appointments with no necessary action on your side.
Appointment mode is only available in the Professional plan and since scheduling happens automatically, you must use Appointment mode with a connected calendar.
Why is appointment mode a paid feature? Because it is typically used for a business or work related purpose and almost all vendors charge for it at prices that range from $10-$40 per month. Our pricing is significantly lower!
P.S. and ScheduleOnce is easier to use!