I wish that deposit payment can be set for each service or for all services if needed. Or for each category or venue.
One more wish is to allow customer to select more than one day for a service which is not the same day and time. It will help promoting a course of service or long term booking that customer can save more money if he booking long service in advance. Repeating booking for every day, every week, and every month are not flexible enough because customer must select the same day and time.