Is it possible to modify the time slot display in the time slot selector to show, for example, a range of times (e.g., 8:00 AM to 9:45 AM) rather than the single start time of the slot?
If you need to manage time-slots of different-defined duration then we have another similar plugin that matches better this requirements, the Appointment Hour Booking plugin. It is services-oriented and you can setup services of different duration into it.