We have been using Syncfusion Diagram for awhile. The main reason we choose it is the data binding capability. The Diagram comes with very rich features. From time to time we need to customize the Diagram to make it match with our requirements. When we can’t figure out how to do it, we contact the tech support online. They reply very timely. Usually is “overnight delivery”, which means we got the answer to previous day’s question when starting work in the morning.