I like that I can easily create content with this service without having an email address from their system yet receive updates when they're made regarding my account.
The only thing I don't think has been fully thought out are all of the features in terms of communication between users who do not have access each other's information/content at times. Maybe add some more options? This would be helpful if you send many emails back-and-forth but want them stored privately. We use this product mainly as an internal tool within our organization so we haven’t had any issues using it outside of normal business functions such as sending invoices or making announcements.