I really like that it's so easy to set up campaigns with different audiences/interests - you can also split your audience into sub-audiences which makes targeting specific people much easier! It could be helpful if there was more data available about what works best in terms of content creation or how many emails an individual subscriber will open vs unsubscribe etc but overall very good product!! Great tool when creating targeted lists as well as sending out promotional messages via mailings (e.g., new posts).