I don't really agree that there isn't a sense of progress. As you get access to more files, more of the bigger picture gets revealed and can be missed on any given playthough if you react in a way one of the AIs doesn't like(via the conversations) or choose not to invesitage any one subject in-depth.
I enjoyed it, the themes of the game incredibly interesting and the history created is well done but I feel there are some weird things that set it back in my mind. Despite being about the horrible oppression of women via a heavily patriarchal society, you can dress up the AIs(or at least one of them, I forget) as you please without any real consequence. Although if you dress up one as a Maid she berates you for a bit and it can actually affect the ending. The thing that really bothered me is there are endings where you basically take the AI as a love interest which is just completely out of place. Then again, the achievements poke fun at this quite clearly so it seems it's actually a parody of visual novels in general but I felt that felt tonally inconsistent with the rest of the game.
In any case, worth playing through and it only takes a couple of hours.
Digital would have been one of the sweetest stories in gaming if it didn't go off the rails horribly in the last bit. Really found it ruined the game's story completely, or at the very least I didn't enjoy the direction they went.