(I can't say that it started very well... our world is in such a exasperating state right now , but one can hope that things will improve in the coming months)

1. The concept:

1. Each task is an item
2. Task properties map to standard IQ fields (Item, Due, Done, Notes, etc)
3. In Google Tasks, tasks are organized under task lists. No so in IQ: task list is a field with a dropdown to assign the task to a specific list
4. Tasks can be viewed in grids
5. If the Due date is set to appear in the Calendar, then tasks with Due date will be shown in the Calendar. If not, individual task items can be shown in the Calendar
6. Eventually, a "Tasks" Calendar entry may be added (in a similar manner as Google Calendar)
7. Sync settings is done through the Google Connect dialog:
   

2. Issues and workarounds:

2.1 Task hierarchy

1. Importing new tasks from Google Tasks will reproduce the task hierarchy if present
2. Hierarchy changes in Google Tasks of existing items will not sync to IQ
3. Hierarchy changes in IQ will not sync back to Google Tasks
4. Tasks created in IQ will sync as level 1 tasks in Google Tasks

2.2 Repeating tasks

1. Repeating tasks can be created in Google Tasks but only for level 1 tasks (i.e. not sub-tasks)
2. Google Calendar properly shows repeating tasks. Individual instances can be marked as done
3. Tasks side-panel does not work well with repeating tasks
4. As soon as an instance of a repeating task is marked as done, it is not possible to make changes
5. It seems that on the repeating day, Google creates a new Task item. In IQ, you'll then have multiple items, one for each past instance
6. Google Tasks API does not expose the repeat settings