JeniSkunk: If you don't have any online friends that you play multiplayer games with, or you simply don't do multiplayer games, then the use of any version of GOG Galaxy is very much almost totally pointless.
StingingVelvet: Not true at all. It is ten times more convenient than the website as a method to organize and download your offline installers and extras, even if you have no interest in the social aspects. The website is archaic by comparison.
I use extensive, well organized, subdirectory trees on the external HDD I use for storing my GOG game installers. If a game has 'goodies' as supplementary downloads, then I download them and organise them appropriately on the HDD, when I get the game installers and all DLC. That's not rocket surgery, it's just basic file organizing as you download. And game manuals are NEVER something that should be regarded as being a special fancy item 'goodie'. Game manuals should be archived into the complete installers.
Downloading a number of .bin files is a simple and straight forward process. Tedious? Yes, especially for games where you have 10 or more .bin files to download.