The speed of connection with the pages/applications that generally take time to open independently, in addition to having a wide variety of applications in their catalog.

The best thing is that I can have all the apps and services that I used for my work all next to each other in a single window for easy access. Even the Community Edition (the free tier) has a lot of great services, and if one that you need doesn't appear, before thinking to upgrade, if it has a URL based dashboard, you can add it as a custom service. That's what I did to add Toggl and Trello. The way it works it's that it functions as a sort of iFrame, so it can display the service you want to use inside its window.

Best feature is the ability to add your own websites to the system.Unlike a few other Apps that fill this space this is great for internal only sites.