I've just started using ToodleDo and so far so good.
However, one thing that is bugging me is that the due dates of sub tasks are not inherited or restrict the due date of the parent task. The parent due date should be inherited from the next due sub task date. It would also be useful to have an estimated 'End Date' which is the last sub task due date.
I search the forums where someone else asked this question and the response was that it was on the to do list - however that was back in Oct 2010.
Are there still plans to implement this? I really like this product and am thinking of upgrading, but the sub tasks area could really benefit from a couple of refinements.