Depends what your goals are - it sounds like the author is aiming to be able to read a newspaper, and for that kind of challenge this stack seems OK so long as they index much harder on the NHK Easy News after getting a basic level of kanji and grammar knowledge (they already claim to know 1000 so they should be fine).
But if the author wants to have any chance of understanding spoken Japanese or speaking, this will never get the author there - much better off watching and listening to as much Japanese material as possible. While I don’t necessarily agree with everything in it, the Mass Immersion Approach [1] gives a good overview of how one can reach a good level of fluency relatively quickly without being in Japan.