I was looking for a todo app last week and stumbled on this one too.

Tried it for 2 days and the first problem I had was that using this at work kind of makes you feel stupid and since that is the main feature of the app I dropped it for which is my top contender for the moment Trello. (tried 2Do, Any.do, Asana, RTM, Wunderlist, Todoist, Toodledo, Todoist, Astrid and some others)

I am still not sure if Trello is what I am looking for but it's working OK so far with some added integration with Pipethru(they work good with Jira) and Zapier(Trello integration), tried IFTTT but they don't seen to like trello.