The Hour view lets you see a visual representation, by hour, of your reservations and inventory involved:
the current time is shown as a red line - which will move along as you go through your day.
why not try having Hour VIEW open on a big screen as you go through a busy rental day?
(with the top panel hidden)
Again, just like with Day VIEW you can create reservations right from within the calendar.
See Also
Reservations Overview