I've been using Reminders as my gtd list since launch. I've been using Toodledo and paper, but this new feature is a game changer (for me anyhow). Just using Siri as a collection tool is unbelievable, and the location based reminder.....! It is so simple to manage all your contexts and see everything at a glance and have it sync to Outlook and all other devices. Yet to put my entire projects list in there as still in testing phase, but loving it as much as I did on day one.