Episode 2 of this game is possibly one of the best bits of game I've ever played (or sat through if YOU A FUCKN CYNIC LEL). I'm going to go out on a limb and say this is the best written and also voiced relationships in a videogame ever, by a country mile. I thought the writing in this was insanely good in Episode 1 & 2, but Episode 3 felt a little bit like it was hurrying to the conclusion (which is a problem Life is Strange also had in it's last episode, except on their best day Dontnod didn't come anywhere near touching this game, imho and by the end of Episode 5 of Life is Strange I had lost the will to live because the game was taking the piss thinking it was way cleverer than it actually was) since you move very quickly through a couple of locations, Rachel basically isn't in the episode and then you black out for a while at end. Eventually you come around but the sense of urgency has disappeared for some reason so you can hang around and have that final conversation with Rachel's mom, even though you're left to wonder at that point what happened to Frank, Damon, Eliot and the police.
Even though you know what happens with Frank, I would still have liked the game to punch me in the fucking guts and show what it was that pushed Rachel and Frank together. 
That said, I did find it incredibly poignant that the game effectively ends with Chloe and Rachel happy together in the junkyard, while you look on with the knowledge of what's going to happen in the future. The ending sting after the credits was kind of a kick in the nuts, I didn't think they were going to show it at all by that point given the omission of some elements from the ending sequence, like the afornmentioned Frank, so it's little 'HAHA SURPRISE ASSHOLE THIS HAPPENS MEMBER?' ambush was pretty effective. 
What impressed me the most I think is that the game was able to take a character that comes off as a bit of a mary sue thanks to the writers having no actual clue how to write a grieving, off the rails, teenage girl and actually does a decent job of leading you through the events that make her the way she is by the time she shows up in Episode 1 of Life is Strange. Combo multiplier because the way the game unfolds you the player are entirely complicit in enabling that behaviour (Chloe I'm so sorry, txt me sometime, can we still b friends, ), or you try to do the right thing and it goes horribly wrong so what's the fucking point of keeping trying? I really didn't care for Chloe by the end of Life is Strange, but somehow in Before the Storm they were able to take the same character and actually leave me a bit sad that not only is our time together over, but that really if you were doing the right thing in Life is Strange the breakup between her and Rachel starts the chain of events that kills them both.
This post is getting a bit rambly but I just want to go back to the Rachel and Chloe relationship for a second, just to reinforce that it's the most believable and well written relationship I think I've ever seen in a videogame and I would possibly go a bit further and say that it's right up there with the best I've seen in visual media full stop. At no point did the dialogue between Chloe and Rachel seem trite, cliche, forced or like it was being twisted to fit what the narrative needed. I, a grown man in his late thirties watched two teenage girls spark up a romance and even though I knew where it was going to end up I was rooting for them the whole way and not once did I have to roll my eyes, reach for the sick bucket or any of that shit. 
Furthermore, the school play is possibly one of the best scenes of any videogame of all time imho, I'm sitting here struggling to think of a better narrative sequence in a game and the dream sequence shortly afterwards with Chloe's Dad on the stage deserves a shout out as well for being equally excellent and difficult to watch in it's final few moments.
While I'm here shooting my load I might as well say the voice acting is ridiculous in this game as well. 
I also really liked the way that as more and more of Chloe's life starts to fall by the wayside, the more she starts to focus on the few happy things from her childhood - her Dad (shout outs to the fixing up a car angle) and Max (culminating in playing pirates and dying her hair blue). 
Oh oh and the Dungeons and Dragons bit was great as well. 

The decision early in Life is Strange: Episode 4 is now the most emotional game moment I've experienced.