We purchased a license for...

AndyIA, USA5 Stern
We purchased a license for the Essential Studio Silverlight Controls & LightSwitch Extensions in late 2013. We primarily have used the LightSwitch extensions/controls and they work well for our purposes for a line-of-business application (targeting mostly reporting). The controls are simple to use, the documentation is easy to understand, and the support has also been great. I would recommend this product specifically based on the support I received when trying to work through a few issues and reconciling a bug I found. My only complaint is I wish the LightSwitch extensions were licensed/sold separately instead of being bundled with the Silverlight controls (which I'm not using). However, I understand that the LS controls/extensions are basically Silverlight wrappers. This is my only nit. If you are looking to add some enhancements to your LightSwitch products/projects (for the desktop client), I highly recommend Syncfusion's product.