Here is my (very light) take after also a month and ten days using Wanikani. 
You know how we all wanted learn Japanese at some point in our life
, well I had that too. I have been learning (or try to learn) Japanese for the last 5 years, or even more. I love reading manga, anime, shokushu he… I mean, you get the gist.
The thing is, nothing I ever tried worked. You see, I went to class where they teach you on these printed Minna No Nihongo back in Vietnam, I went to university where every material was given was designed specifically for the purpose of learning Japanese, I
pirated books trying to learn. Nope, none of them actually sticked.
About a year ago I found Wanikani, and actually thought that this is bullshit. I got to level 3, and did really think that I’ll never touch them again.
That is, until 40 days ago, I go to the forum and see how successful people are with WaniKani. Seeing the 60s bragging about the cakes really inspired me. People talking about knowing 2000 kanji. People talking about playing FF IX in Japanese and understand all of them. I mean, these people can do it, so can I, right? So what do they differ from me 40 days ago? They put their effort into it. I realized, that no matter what I do, Wanikani, Genki, Ibami, whatever, if I don’t put the effort to it, I won’t ever be as good as them.
To be fluent in a language, just knowing only the words you need is nowhere enough. It’s knowing alllll of them. And 2000 kanjis is not even allll of them yet. And how do you know what words you will be needing? Fact, you will be needing allllll of them.
The purpose of Wanikani is not to teach you Japanese from the ground up. It’s textbook job. Knowing how to greet people, to bargaining with a seller, etc. is not the purpose of Wanikani. Wanikani is here to teach you 2000 kanji, and that’s it. And it worked for all the 60s people. Look at them reading manga and stuff, I’m soo jealous.
Sorry for my incoherent rant, but you get the point.
TLDR: Put your effort somewhere, and you will be rewarded. Wanikani purpose is to teach 2000 kanji, not a textbook.
Edit: I recently saw a kanji on my wife’s Japanese make up bottle, and realized that i can read the whole sentences (Saying that’s it made from melatonin and stuff), I was soooo happy. 