What does Doodle do well? Doodle is great at creating easy-to-use polls for finding times available and scheduling meetings and other events.
What does Doodle not do well? It has limited functionality and struggles across time zones. For instance, if you are trying to organize a group of people who will all be in the same time zone for an event, you can't FORCE a time zone onto the poll so when people go to answer it will be in the time zone of where they are.
What do you wish you had known about Doodle before using? The administrative side of Doodle leaves a lot to be desired. If you are creating simple polls and have little need to edit, share, or collaborate, then it will work.