Good app but needs some tweaks to make it really useful. Landscape view is a must for iPhone or iPad viewing, otherwise the calendar very difficult to view and assess.
Other great additions would be to allow project specific milestones and additional detailing of projects (assigning people, deadlines, overall project planning, percentage completion, etc) and adding tasks to projects as sub lists.
Otherwise this is a great service and software that provides a clean and simple way to schedule a team and manage resources.