I understand you want to have feedback regarding the DCVAI course from the CLN Store.
I havent taken directly that course. But I have taken the ICND1 course and I find it a very valuable resource for preparing with
official e-learning and with great labs to learn. Also its a friendly-user interface.
In my humble opinion, I would advice you to try the "Free Trial Version" currently available for this course.
That way you can experience the course on your own, so you have a better experience on the material, interface and the labs.
The CCNP Data Center e-learning is available at the CLN store at the following link:
I can tell you that the CLN Store provides great resources for E-learning of all the Cisco Certifications.
I wish you all the best in your CCNP Data Center studies.