First of all, congrats on launching a product. Without having ordered the book, here are my comments on your website: The signup page asks me to enter an email

First of all, congrats on launching a product. Without having ordered the book, here are my comments on your website: The signup page asks me to enter an email address, and says it will send me a verification link that will allow me to log in. But in fact, no link is sent, no verification is performed, and I can easily log in with an email address that I don't control. I can't set a password without paying, so there's apparently nothing to stop anybody else from logging in as me. It's hard to fully judge the study program, since only the first few lessons exist as anything other than placeholders. But after skimming through it, it seems like compared to other resources like Genki, the content is very heavy on kanji, somewhat light on grammar, and extremely light on vocabulary. Is there a reason for this? Also, despite your description of the course as "beginner-friendly", it seems like the early pages have a mixture of beginner-level and more advanced information. I would expect beginners to have a hard time figuring out which parts are most immediately applicable -- especially since you give them very few examples of actual Japanese sentences that use the grammar points you're teaching. For example, I find it hard to believe that it's in any way useful to tell someone "the particle を can be used to describe motion transiting through a space" when they have never even seen a single real example of it being used in its much more common role as a case-marking particle. Basically, I get the overall impression that this course would be much more useful to a linguist who wants to study the language analytically, as opposed to a typical learner. Finally, it would be good to see some information on the credentials of the authors. As you're probably aware, there are lots of mediocre, amateur-level Japanese language resources on the web, many of which are created by people who are either not fluent Japanese speakers or lack pedagogical/educational expertise. What evidence do you have that your teaching strategy is an improvement over other approaches?