I just finished Quartet 1, and was going to begin quartet 2, then do Sou the SKM yada yada…then I found this. I have been using Wanikani for kanji and man is it fantastic, and this encompasses everything else. Obviously you will need to immerse and there is still room to do SKM and Sou for the JLPT as well, but I love the fill in the blanks and all the customization and oh my god…WHAT TOOK ME SO LONG TO FIND THIS???
Would love to hear from you all how you get the most out of your own 使い方