The ROI has not been good. In the past, it was good, though.

This varies across our customers but they all are seeing benefits over their erstwhile in-house solutions.

Although Oracle Database as a Service is expensive, it is worth its cost, and we have seen a return on investment.

I have found that the solution serves the money.

We have seen an ROI on the solution.

We have not really seen an ROI since the product is so expensive. 

We have received a return on investment.

The solution is worth its money. 

It really depends how this is measured.

Reduced the number of traditional storage/server architecture. More productivity and quick provisioning of the database helped moving the application to production quickly.