Migrating from Wunderlist couldn't have been more painful. First I had to open Microsoft account just for this app. Then, importing from Wunderlist messed up owners, all lists that were shared to me ended up as mine, I had to re share them to the original owner again. Anyone invited to the list must have MS accounts, I had people leaving because of this. And I don't get any notifications when people add new tasks. It may look the same as Wunderlist, but the app is starting to annoy me...