I have been using this book with adult students for two years now.
If you are a beginner and looking for an affordable package of books, then this is not for you.
There is no coherence in the distribution of grammar and vocabulary, many words are not translated anywhere within it, the texts are "heavy" and difficult for someone who is just starting out, and the description of grammar phenomena is very concise and not helpful at all.
If you want to brush up on your knowledge, again, this is not for you.
The vocabulary and exercises are like they are aimed at younger ages (while the book is supposed to be more suitable for adults).
Listening, writing, and speaking are very boring.
In short, I definitely would not recommend it for anyone who wants to prepare for a degree.
If someone is simply interested in having a book with the purpose of maintaining their language skills, it might be helpful, but for nothing more.
Also, the fact that it is 5 books condensed into 3 is not helpful at all if you want to read and do exercises simultaneously, because you have to flip the book back and forth.
I would simply describe it as supplementary and would not recommend it.