The biggest issue with the Media Library is that it does not handle a mixed library of MKV, AVI & VOBs correctly. If the VOBs are in a VIDEO_TS directory, the media library will place these titles after the MKVs and AVIs. It can make the library very difficult to browse. If you turn off the media library, you can still browse you library through the “folder” option, with all the Meta-Data intact. Keep in mind that turning media library off, also disables the Dashboard. I am in the process of converting all of my multiple file VOB’s to single file ISO’s, which should allow me to leave the media library turned on.