This book is at least twice as long as required for the information it contains. Many items are introduced, discussed, and discussed again when they could have just been stated.
Also, the book is very dependent upon the existence of an antichrist figure accepted around the world. This is not logical.
Many of the things predicted in this book actually are happening, moral decline, lawlessness, etc, but that isn't new in human history.
Many of the technologies predicted in this book already exist, and some just seem too fanciful for belief.
It is a quick read and is very mildly informative, but if you miss it, you won't miss much.