I've been training this way most of the spring. There's a Facebook group and Klaas answers questions.
If you are older and working out alone, it works really well. Doing tempo pace 6x1000s with a jog between is a lot easier than doing a 6k tempo, and you can do it more often, and your fitness just builds daily. And it's a good gentle way to introduce summer speed without injury risk, compared to stepping on the track in spring.
You do need real self discipline to keep each day easy enough that you can do something similar the next day.
What Facebook group is this ?