In regards to source quality, A Dictionary of Japanese Grammar series (Basic, Intermediate, Advanced) is considered the best resource for Japanese grammar in English. The topics covered are extensive, in detail, and convey the material in as easy to understand manner. Tae Kim is regarded as the best free resource by a number of people, but his topics covered are not as extensive or in detail but he does convey the material in an easy to understand manner.

There are typos. ADoBJG are entries from the book which are laid out in alphabetical order. The sentences for the course are taken from an Anki deck someone posted meaning there are a number of typos. Now, I’m going through this entire course as a student, just a bit faster than average as I’ve already done most of this material, so that allows me to catch typos and issues as they pop up.

There are random number of questions per lesson. For lesson entries, what I did was match up the ADoBJG alphabetical entries with the lesson course of Tae Kim’s Grammar guide. I then upload the ADoBJG entries in the Tae Kim order. However, this means there are some lessons with no equivalent. I still keep the lesson listed for people wanting to do parallel learning. That’s what I’m doing as I go through this course catching typos.

There is missing audio. At first, neither Tae Kim nor ADoBJG had audio, but soon after posting I and later ijkjk made text-to-audio for the sentences, however that means there can be problems. I try to have a male and female voice per sentence which might not be the case 100% of the time. However, all sentences should have audio. As mentioned, since I go through all entries individually correcting typos I’ll also do the same correcting audio problems.

There is complex vocabulary. In addition, ADoBJG has complex grammar. As mentioned ADoBJG is laid out as a dictionary. The entry example sentences uses grammar levels from all parts of the book so it’s not ramped up slowly. Tae Kim starts simple and slowly adds more vocabulary as the lessons continue.

These can be mitigated in two ways. First is not do ADoBJG courses till after one finishes the Tae Kim courses. As you reminded that this should be the first option, in the Group Study course I moved ADoBJG entries to the end. I’ll also update the course in the first post and move them to the end. Users can still choose to do ADoBJG in place of or alongside Tae Kim grammar. For complex vocabulary, I already made a list of 300 or so words in ADoBJG that don’t appear in Core 2k or Tae Kim. I’ll add these are vocabulary listings prior to each lesson.

Thanks for you reply and I hope my response makes sense. I’ve made a couple of changes to the course as well so thank you for the feedback. It’s my hope people doing these course obtain legit Japanese literacy and fluency that can be expressed in real world use or even standard proficiency exams like DLPT for Japanese or JLPT.

Let me add one final thing that people really should do ADoBJG if they have the books even if it means waiting till after they finished SGJL 12. The book is that good and the benefit will be invaluable. Plus, it’s good to finish those four courses before starting the Intermediate Pt 1 Stage. Those stages only use ADoIJG and ADoAJG as the grammar courses.