Thursday I attempted and passed the AWS CSA exam but barely. I did like many and would also recommend ACloud.guru along with the whizlabs.com practice exams. I am pretty confident that I would have not passed by using the material from ACloud.guru content alone, although they are now offering a AWS CSA Practice Exam Module that was just released this week but IMO too late to switch gears. But for $10, would have been a piece of mind.
So about my exam. It was 55 questions and not 60. Maybe that means it was harder (it was), cause I would say 1/2 of the questions appeared like new content that wasn't covered in detail with ACloud.guru content or examples from the WhizLabs.com practice exams. Many questions looked like they were pooled from the AWS Developers and Networking content. I think had I studied the AWS CSA in conjunction with the AWS Developers/Networking content I would have no doubt scored much higher. But I was scoring between 92-100% on both the ACloud.guru and Whizlabs exams. Being overly prepared is the best advice I can give. Understand the reasoning and logic around the content and not just memorize the answers in the practice questions.
Pay special attention to the implementation/deployment component along with VPCs. if you don't become very good at VPCs you will most likely fail the exam. I did very well on the VPCs (I was a network architect in my previous life) but the implementation/deployment content seemed new or at least something you really wouldn't know unless you have practiced it or work with it on a regular basis. Know about Kinesis Firehose, Cloudformation, Stacks, STS and SAML. When you think about it, think about it in terms of what a daily AWS Architecture would encounter. If you go in with that mindset early then you will start to pick up things around the course content to strengthen your knowledge.
If you feel like you are not ready to sit for the exam, then push the exam date out. I did that twice (before the 48 hour window to reschedule in the USA) and I am glade I did. During the exam I barreled through questions I was 100% certain on and marked/flagged questions I was on-the-fence about but put an answer down anyways (always do this). After I reached the last question I went back to the marked exams and spent more time on those. I would say about 15 questions were flagged and the remaining 40 questions I was pretty confident in my answer. No doubt the questions I flagged were the ones that challenged me most and reduced my score. The only way to score 70% was by passing 38.5 of the questions. Meaning that you got credit for the correct selections on multi-parts questions (unless they rounded up, IDK).
At any rate, overly study, know when you are ready and stay focused and you will pass the exam.