Not only does it allow you to keep your completed file, you can just load up a save point at various parts of a game. (gonintendo.com)
I watched a few of their reviews years ago and they spoke about various parts of the games being reviewed in some depth. (gonintendo.com)
While the core parts of the game and UI are in place, there are still various parts of the game that are missing or not completed. (thatvideogameblog.com)