From the January JEE Mains held by NTA, you can see that ALL of the inorganic part was from NCERT. Reading every line of ncert and understanding it should be more than enough for inorganic chemistry.
For physical chemistry, many question were from chapters of inorganic chemistry like ppm concentration question(s-block). Again, almost all question were standard type and could be solved if you have done some practise. No tricky questions.
For organic chemistry, there were some really, really simple questions like find no. Of stereoisomers in a simple compound. One topic of focus was Acidity and Basicity of organic compounds. Mastering that should be helpful. Most of the organic question come from aromatic chemistry as they combine many elements of organic chemistry together.
Don't forget chapters like polymers,chemistry in everyday life, environmental chemistry as 1 question from each chapter is usually asked(sometimes 2) which are very easy and theory based.
So, for inorganic stick to ncert. For physical do basic questions only if you are aiming for mains only and for organic try to master acidity basicity.
Wouldn't recommend the book for jee mains for chemistry. I know this isn't the answer you wanted as you wanted the review for the book, but I wanted to add this to discussion of preparation of chemistry for jee mains.