I take it that not too many people have played or completed this. I just finished it last night.
I really enjoyed it. It's 3 episodes at 2-3 hours apiece and I think it was starting to wear out its welcome a tiny bit near the end so the length is about right for these kinds of games. I definitely enjoyed it way more than LiS2 and it brought back those cozy, at home, small town vibe from LiS 1 and LiS BTS. In fact, as the story goes on, the ideas of keeping bonds through thick and thin, keeping home close to your heart, and spreading fond memories are central themes.
Like any Dontnod game, there is some stilted storytelling and conflict that seems so one sided. In this case, Alison has a hard time coping with her past. I had a hard time connecting with that because her brother seems so levelheaded by comparison. So some of her internal conflict was a bit beyond me.
This game has a great carrot at the end of the stick - what happened to your mom? The resolutions are solid and it's nice that player choice affects the final outcomes, but I wasn't necessarily gripped by the twists, turns, and revelations throughout.
A solid game, I recommend it, but it isn't going to be super impactful in the grand scheme of things.
EDIT:
I just want to add that after Chapter 1, I thought there might be a gameplay mechanic where your decision on whose memory to believe affects your relationship with your sibling. Turns out it DOES. But I didn't even know until I hit the Outcomes screen in Chapter 3 and I was among the other 89% of people who kept a strong bond between the siblings soooooooo I have NO CLUE how somebody could even manage to destroy that bond because I did some very hot headed stuff throughout and still kept the bond in-tact.