I like how easy it is to set up. It's easy to understand & implement in most languages. It supports drag/drop so no coding required. You can create components that make it easy to reuse code. It has many different connectors but none of them are great. There are some I've used which work well, but I find it hard to get things to connect together. If you need something robust that will support large amounts of data and lots of connections, this might not be right for you. There's also not much out there that compares with it when it comes to ease of setup & implementation. We have a few components we've created or modified to work with our projects (some just using jsPlumb) however nothing that would have been difficult to build ourselves.