Any review on modern montessori international group?

According to a Facebook review page, MMI Group averaged 3.8/5 in terms of ratings. From what I've read -- the reviews are mixed. There are parents who are impressed and happy with their children's progress while some lamented over issues relating to administrative stuff, turnover rate etc. Perhaps you can peruse through the page, which I've linked below. Facebook reviews, in my opinion, are quite honest and straight to the point. https://www.facebook.com/ModernMontessoriInternationalGroup/