Being able to customize where additional time needed for an add-on service goes. Currently, the additional time for an add-on service goes under "duration." However this creates a problem when a stylists is double booking. For example: The base service is a full highlight. If the add on time is added to the "duration" then application time is too long, and then client #2 arrives too late. Further, then there is not enough time to actually do the deep condition service after rinsing the color from client #1. You cannot do a deep condition treatment before or during a color application. You have to do it after the color has processed. Sometimes it really matters when an add on service is performed during the whole appointment visit.