I passed the AWS solutions architect associate with the help of these tests with about a 1.5 Months work including ACloudGuru’s and Adrian Cantrill’s courses! I only used the review section for the practice tests. It is definitely worth taking the tests several times until the concepts really start to sink in. I made sure to review all the questions the first time I went through the test and then in future tests if I got the questions wrong I read the descriptions again. Off to get my AWS solutions Architect Professional Cert now!