I recently read an article on HBR with a similar sentiment towards to-do list apps. The author there suggests trying to "live in a calendar" instead of in a to-do list (because, so he thinks, they don't work). But I think it's a good thing that there is such a variety of to-do list apps one can choose from: for those who do use to-do lists, everyone can find something for his or her taste! For example, I've somehow settled with Deed.