You've obviously never used the Telerik components. If you want to build the thing in their demo the controls are fabulous. If you want to build anything else

You've obviously never used the Telerik components. If you want to build the thing in their demo the controls are fabulous. If you want to build anything else you'll suffer more than you can imagine. I've had the misfortune to use several revisions of the Telerik for ASP.NET controls, and the Telerik for Silverlight controls. The Silverlight controls were atrocious.