I had noticed some people memorizing the kanji all at once, which I even did at the beginning using also ANKI(app), but at some point I decided to give it a try to this book. The only think I can say is that I wish I had used it before! It so convenient studying the Kanji in the way they are organized by chapter in the book. It saves you a lot of time and also it improves the way of learning them by finding some correlations between some of the kanji. After this good experience, I will definitely going to use the N2 of the 新完全マスター series.
It is a good practice book for the JLPT N3. The way it organizes the Kanji helps to see differences among them. Only thing to be improved would be less focus on handwriting, given that the JLPT is a mainly recognition based test.