it is a thorough course for beginners - HOWEVER - it took over 3 hours to navigate and it was an unfair waste of my precious time. I read the book off line and I did NOT need to wait through the timer-based pages. Even if I had never read the book, the amount of time allowed on the website was double what was needed to read and comprehend those pages - it is NOT right to make people invest so much time if they comprehend and can pass this test without waiting for this timer to count down. This was a big disappointment. I wrote the test and passed in just a few minutes and you must have an option for people to do this! Don't waste people's time.