This book provides a good coverage of the A+ Core Hardware exam with about 80 percent of the questions on the Core Hardware covered in some part of this book. However this book does not provide as good of a coverage of the Operating Systems exam. A lot of questions that came up on the OS exam were not mentioned anywhere in this book.The practice exams included with this book are fairly basic. About 80 percent of the questions on the Core Hardware practice exams with this book were covered on the Core Hardware exam. Only 50 percent of the questions on the OS practice exams were covered in the OS exam.This book also needs to be better organised around the A+ objectives.Overall, this book covers the Core Hardware exam very well but the OS section of this book needs quite a bit of improvement.