Okay - I'm going to start off with a 5 and I'll revise from there.  I'll tell you why I am giving this score when I have not even received the book. I am a well educated individual and teach at a college level.  My husband is a DVM.  I want you to understand where I'm coming from here - I'm not an uneducated lout.  So I saw this commercial on TV and thought hmmmmm....I have a daughter who struggles in math as well.  I thought this might help her (and I might find it useful too).  My husband was also intrigued.  I did some research on the web and found one of his teaching videos (It's about a half hour long if you are looking for it).  As I started watching, I thought...this guy is a quack.  My husband even said "How much did you pay for that book?"  I hadn't ordered yet...I was still trying to figure it out.  So as I continued to watch, things started to make sense.  He seems to use a combination of chunking and mnemonics to help you work with the numbers.  It's not going to make you a math whiz - you still need to know how to do the basics (add,subtract,divide, multiply), but...if you can do the basics, it seems that this will make you able to expand upon that knowledge.  I'll add more after I get the book and start learning....<br><br>Okay - have had the book now for a little over a month.  The information contained within is very simple to follow.  At first, it seems as if it won't work, but with practice, it actually makes difficult math problems easy.  It's more for straight calculations (addition, subtraction, multiplication, division) rather than the higher level critical thinking involved in algebra or calculus, but it definitely makes those quicker as you don't have to take the time for the basic math.  The memorization skills taught are also very useful.  I have difficult putting names to faces, but now - it is much easier.  It's basic association and mnemonics, but the tips are very useful.  All in all, this is a very good book.