The speed advantage of VDL 2015 compared to its predecessors, which is clearly felt when reading a project is made up, unfortunately, many times so that the rendering takes much longer than eg VDL-2013. The reason is that smart rendering is not working. (Tested with AVCHD, Full HD, 50p). You can tell that the SW has been knitted with hot needle. It can be assumed that must elapse a year like even with their predecessors, until a patch stabilized shortly before the re-issuing a new version of the SW and they can do that what is promised in the advertising. VDL 2013 is stable and can quickly generate video through a functioning Smart Rendering function many times as VDL 2015th Update: 12/13/2014 The service of Magix has now stated that the problem with smart rendering is known. Since the MainConcept codec but anyway is included in the program still transitional, the issue is no longer fixed. Ie it is not planned a key feature with the will explicitly advertised actually implement. Criminally certainly borderline. Therefore, only an asterisk (Da 0 star does not go)