A very interesting and useful course. This is the first time I have encountered such an unusual approach to grammar in its speaking aspect. I learned a lot of useful things for myself, in particular, intonation differences, stress in a sentence, how to highlight parts of a sentence with your voice, some interesting word combinations, voice abbreviations, etc. In general, this is a very useful course - you simultaneously brush up on grammar and improve your speaking skills. I strongly recommend the Speaking Grammar Course from the "Keith' Speaking Academy" to all those who want to understand native speakers and be able to convey their thoughts to them.