Hi there -
If you are viewing a Timecard, it is easy to see the total Time Spent for each line (project/task/labor item/etc.). It is not easy to see the total Time Spent per day. If the employee is working on many different projects and tasks throughout the week, it is difficult to get a quick picture on how many hours they worked for a given day.
Subtotals by day on the Summary tab of the Employee Time Card seems like a quick, but very useful addition.