[Greg Titus]

As neils says, you can uncheck hours to remove them from the display. Now in beta 6 you can hold down the shift key while dragging bars in the gantt view to 'snap' the bars to the grid lines (so depending upon the scale, to the nearest day or nearest week).

In the future we'd also like to add some more logic for truly being able to specify the smallest units that you work in so that you could just specify "1 day" somewhere and have the whole app work that way, but that is a fairly involved set of changes.