What I like about Symphony is the UI and feel of the platform. I also like that they provide support for a workstation application on your computer and also a web application. The security they offer is also top notch as that is one of their main selling point. Their APIs are also very easy to use and it offers enough capabilities for you to build most of the apps that you would want to use with the platform under a financial background. The ability to create your own service accounts, or bots is also very cool.

Cross bank connectivity, Ability to add multiple people, follow users, share media

The ability to casually chat with a colleague without sending a formal e-mail.