We are using Essential Chart to display real time data in a very complex and flexible new application, using C#, WPF and .NET to create and destroy graphs on the fly. We have found that the Essential Chart does everything we require (so far): dynamically adding annotations, strip lines, legends, good performance, grid, zoom, interactive cursors, different data types. The support has been very helpful and fast: I have had responses back to queries within two or three days. I was impressed that they made changes and extended the product in response to our needs. The samples that come with it are also extremely useful: although I am finding that a lot of the time I am relying on the response from the support team in order to get some of our more tricky issues resolved.