I used code X5B-D36-76C and got some money off when I signed up. The code never expires. Otherwise, with regular mail shipping of the certificate, the course costs $43. Overall, the site was great, super easy. There awas no clock or timer. At first, I read everything and took each 2 question quiz like intended. I failed one of the quizzes because I got one question wrong, but it didn't matter--the quizzes are only there to help guide you and many of the questions end up on the final exam. Later I realized you can copy and paste the chapters to microsoft word and go back to them while taking the quizzes. I also used them on the final exam. Most of it is common sense, especially the final exam. There are no time limits. The final exam can also be retaken as many times as you need to to pass with at least an 80%. Would recommend it to everyone.
If you notice, all the complaints are from about 4-5 years ago. I had none of these problems; there were no questions asking me about fish or triangle colors. I contacted the site for other reasons and got a reply within an hour each time. They seem to have fixed their problems, whatever they were.