Astounding. Gorgeous to look at, perfect level of creep to understanding, just tricky enough puzzle-wise, some truly heart-aching revelations. Just wall to wall great stuff!
I just want to note that I ran into a small bug; in The Slow Vanishing. In the very first instance of the hallway, if one looks at the statue of Mnemosyne first the camera tweens back to the area with the doors for no apparent reason. This isn't game breaking; you can walk back to that area and then return to the hallway, but figured you might like to know! What a labour of love <3