The ease of use, the reporting and the fact that it's all hosted in the cloud makes this software very flexible and easy to implement. It's also relatively cheap for what you get. I have not found anything I dislike so far. We've been using Inumbo since early 2016 and we haven't had any issues at all. Spam has become much more difficult to deal with over the last few years. Our inboxes are now filled with spam and other forms of email fraud. Inumbo allows us to filter out most of these emails before they even reach our servers.