SO GOOD! Was up far too long, all my time playing Souls and Blood Borne have prepared me for this game. I beat the first boss on second try and have only died like 5 times total.
Saw a few streams later in the game, and they say that the difficulty spikes up quite a few times through the game. First part, you get familiar with the system, can get away with mistakes. Middle part, you need to master KI. Later (rank 5) missions requires using items/skills, dodging, ki, (de)buff management and gear management. Higher level missions also really punishes you for rushing.
Game doesn't unlock until midnight today here

Have the deluxe edition pre-downloaded.
PS: Saw someone ask about co-op. I saw a stream where two people played co-op, and they said that to join in missions together, one player needs to have completed it first. So, while it is easy to match up with each other, it doesn't sound like you can play it blind together.
EDIT: also, not mentioned in the tips video.
- Later you unlock "PvP", where you select a faction (there are 20ish?) which is either red or blue. This I think increases glory gains (currency for unlocking bonuses at the Tea House) from defeating the player summons of the opposing clan. I believe actual PvP is a planned DLC.
- "Diplomacy" tied to the gestures (gestures have different colours)
--- Mimics (clone of yourself from a chest) can do an emote when emerging. If you quickly correspond with the correct emote, they will despawn with a loot shower. If you do the wrong one, they will attack.
--- Hidden walls often appear as a wall with eyes. If you do the correct emote (believed to be based on the colour of their eyes) they will despawn. If you do the wrong one, they will attack. You can get hints by looking at graves surrounding the wall with the message "died with a neutral response" or something like that, where the text will have a colour.