I previously had, and loved, Wunderlist, which Microsoft bought and then made worse before transforming it into Microsoft To Do. After trying to adapt, I dumped it and went to Todoist, which is great. You can import your Wunderlist stuff directly into Todoist.
"In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion." (1987) -- Carl Sagan
