"Interesting"
An interesting concept is raised in this book but Sam Harris fails to give me much enthusiasm for it. He also speaks very quickly and uses a lot of jargon which can make it difficult to follow unless you have studied this topic before.
"Great overview for a beginner"
This book is great because it gives an overview of many of the major historic philosophers but doesn't go into so much detail that it bores you to sleep. I found it particularly useful as I am a philosophy novice and it has helped me find out about various philosophers that I hadn't heard of before.