As a visual novel... it's not that good, at least in the traditional sense, the story is not that good, the characters are not that good, the decisions are not as relevant as we would like them to be.
Now in the non-traditional sense, it's excellent, it's a gameplay model that does more than just make you click and click on items, it's a game that takes advantage of external elements to create the illusion of reality, it's one of the most effective fourth wall breakers in video games, and in that there's a message that makes you a better person, like Katawa Shoujo, but in a non-traditional way.