Has anyone had any experience with INTESOL Japan - specifically, their 150-hour online course?

In the best possible world I do realise that an in-class TESOL certificate would be the ideal option. However, this is blatantly impossible due to timing and location, and so out of necessity I'm searching for an accredited online course.

INTESOL Japan looks great from the website, but I've read one not-so-great review (http://maestoso.org/2014/07/thoughts-on-intesol-japan/) and have been unable to find any other reviews at all so far.