The ease of use, quality customer service from our account manager (Cheryl), ability to configure it for all my email addresses in one place at once! It's easy enough that any IT person can do this without needing training or support resources - which is great if you don't have those available yet :) I've been able get up-to date info about archival status across every single mailbox we send mail into since 2016 using their product alone!! There are no other products out there like theirs where