I purchased X-Plane 11 yesterday afternoon. It is a digital download, which is nice. The manual is in html so you can either view it from the X-Plane web site or load it from the html provided in the X-Plane 11/Instructions directory and view it on your web browser.
I played around with it a bit yesterday evening. I copied the Carenado Beechcraft Baron 58 into the Aircraft directory straight from Aircraft/General Aviation directory from my copy of version 10. Everything seemed to work except there was no image for the Carenado version, only a big question mark.