What is Reddit's opinion of JLPT N1 N2 N3 N4 N5 Official Book Trial Examination Questions 2nd Edition and Basic Expression?

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Udemy has some online classes for purchase that walk you through different parts of the exam, drill kanji, etc. https://www.udemy.com/course/jlpt-n4-ce/learn/lecture/10923856?start=0#content

On amazon there are also work book versions of practice exams. https://www.amazon.com/Official-Trial-Examination-Questions-Expression/dp/B091G9M871/ref=sr_1_6?crid=1ILWP57M2MO9K&keywords=jlpt&qid=1663340978&sprefix=jlpt%2Caps%2C137&sr=8-6

I'm using both to supplement my studying. Also, there a wide array of podcasts you download for listening practice.