It is not bad, you can get free AWS tier accounts with which to practice. It is mainly learning the AWS jargon/infrastructure. It is a practical example of the theoretical concepts presented in the CCSP material.
Be aware, the AWS Certified Developer — Associate was updated this year and the test I took is being phased out Aug 12th.
I found that some of the questions were not covered in my material.
The cost is not bad:
AWS Certified Cloud Practitioner - $100
AWS Certified Solutions Architect – Associate - $150
AWS Certified Solutions Architect – Professional - $300
The Certification is valid for two years and then you have to retest to recertify.
If you have Safari Online, check out the live training. It is included with the subscription and even if you can't make the whole class, they record it and make it available to you for later playback.
I'm attending AWS Security Fundamentals on Aug 7th.