We are using Syncfusion GridGrouping, Grid controls, DockingManager and a couple of other controls. All these have a rich functionality and are very flexible due to their elegant design. As for the support, I need to mention that we are using old 4.x version (while the current version is 9.x)., so the support team often forced to merge fixes from latest versions back to this old one. But even in these, pretty unusual conditions, we are still getting very valuable help from Syncfusion!