This book is both fascinating and a boon for any serious student of the language.
Some of the words in the earliest sections of the book will be surprising, and some of those that don't appear will also surprise you.
As a learning tool, I can say from personal experience and from the experience of friends, thoroughly learning the high frequency words and working your way through will increase your reading fluency in leaps and bounds.
As a fascinating linguistic study it will be of interest to any Russian learners who wonder how things such as communism, glasnost, perestroika etc have affected the language.
It isn't a book for beginners, it's a bit heavy for anyone just starting out (literally as well as metaphorically ;)) as well as not being especially cheap (though it's good value). This isn't a dictionary in the "I-want-to-know-the-word-for-bread-now" sense, and anyone expecting that would be disappointed. But for any student who wants a structure to vocab learning, or wants to improve reading fluency, etc, it is a godsend and well worth the money.