How successful are your dv implementations?

Data vault is great! How succesful are the implementations out there? Below are some questions regarding data vault implementations.
Please give me your input on:

Are you geting all the benefits of data vault or is there any area where you feel that it can improve?

Do you use an automation tool, if yes what Tool?

Have you successfully implement a CI/CD in your dv solution, if yes what tools did you use?

Have you seen platform limitations for your dv implementations, if yes what platform?

What is the worst headache so far from your dv implementations?

Do you deviate from the standard of dv1 or dv2 in some way?