I like that it's easy for me as an admin of my organization, because i can send all our email from one place with ease - no more searching through multiple folders or inboxes looking at different mail clients out there (like outlook).
It doesn't have any features yet though so we are still using this software just testing everything right now but if you're having issues please let us know before contacting support directly- they usually respond fast!! We use EMAIL TREE mainly when sending mass messages such as announcements about new products/services etc.- also great feature is being able to add signatures which saves time by not needing people copy pasting them everytime- saving everyone alot of work.