I currently do not have JRiver installed, and wanted to get as much information before auditioning JR 23. I, and many others, are looking for a replacement for Windows Media Center, and our DVR systems can be complicated, and time consuming to set up. Testing another DVR system, while concurrently using Windows Media Center, can affect its reliability, and I don't want to break anything. Please correct me if I am wrong, but, after some research, it looks like JRiver is currently using Rovi, as its default EPG provider. Windows Media Center currently uses Rovi as a provider.