Yellow books of Vajiram

How are the yellow books of Vajiram? Are they exhaustive wrt syllabus? I prefer to have all material in one booklet in a consise manner rather than referring multiple books with paragraphs for a subject. So I plan to uae yellow books as my base and refer standard books whenever needed only. I have 32 booklets of 2019. Is that enough? Which subject books are good and which are bad?