Just looking at the tool (or the technical aspects of the product) alone, I would give it a 5-star rating.

There are still some shortcomings with the product:
- There is no clear, holistic, and coherent onboarding guide. New users need to view many isolated videos to get a sense of how to do certain things. Perhaps a wiki-style with keyword search capability should be provided as a body of knowledge for the product.
- There is no explanation of the architecture of the product, e.g., what is a page and block and what can be included in a block, etc. Also there should be an explanation of what are the Actions an Activity that can be added to the content. If examples of how those assets can be used, it would be better.