Unreliable
In the past two weeks 2Do wiped out entire lists twice. Since automatic backups can only be set up q24h minimum, you can never fully restore your lists if you are a heavy user. When you try to restore from backup and then sync for the first time the server throws some error and syncs a lot of empty list that you then have to manually delete.
Going back to OmniFocus.
alfredjingle about
2Do, v1.5.2