Anyone else living in Japan using Kumon’s Japanese language learning for adults as a resource to supliment their learning journey?

I've been living and working in Japan for a little over two years not, I don't have the time to commit to a full time language school, on top of self study, working with Japanese, having a Japanese spouse I find this as a pretty sufficient resource, I plan on taking N4 JLPT in December, has anyone finished this entire course and what are your result if so?