Hi, I took the SAA exam yesterday (14.08.2017) in London. I went through all 7 Whizlab Practice Test and the Diagnostics test a number of times and I found in the exam about 60% of the questions were in NONE of the Whizlab tests. Luckily, I had gone through an SAA course (via acloudguru) and had previously done the Developer Associate exam, so I had a solid foundation of knowledge. I was able to figure out enough questions to pass the exam. But it was a tough exam and I had to use the full 80 mins. The Whizlab tests were useful to go through as the style of questions were similar in style, so you can train your mind to be used to the style. Bottom line is, you can't rely on "just" these tests you need to know the core material well. I did use the Whizlab tests for the Developer Associate exam and the practice tests there were closer to the ones in the exam. Course aside, you also need to look at the AWS Faq's in the core topics, to pick up some specific details. Also, doing the labs helps massively as does practical implementations.