Sync with the Calendar App
With in a project either sync with all or a subset of your Calendars. As you can have multiple projects, you can decide which Calendars you would like to combine and as it is easy to switch between projects, you can quickly see different combination of your schedule.
iCloud syncing between devices
In some circumstances you might not want to over populate your calendar with your tasks. So set the your projects tasks to be saved with in the app, but as you have the option of syncing using iCloud, you can have them available on all your devices.
Combine option 1 and 2
Why not set up a project on your device, but also include you calendars so that you can see how your tasks relates to your appointments. Again using iCloud and calendar syncing this would be seamlessly available everywhere.
Firstly you can export your timeline as a desktop image, so that you are always aware of your schedule.
Alternatively you can export a high resolution image of your timeline to be printed and used in a report or a presentation.
The third option is to email a tab delineated text file of your project which can then be imported into a spread sheet giving you many more options. Using "iPlan myTime" you can calculate a fees associated with a project, as it displays the number of working hours for each task in a project.