Cloud Management Platforms (CMP)

Interested in everyone's take on the CMP market. Like most of the IT industry, it has been full of consolidation over the past 2 years and AWS/Azure are making their own "CMP'' offerings. With that being said, stand-alone CMP offerings are multi-cloud focused so do have some advantages.

1. What is your experience with CMP? Any good, bad, ugly stories?
2. Do you trust AWS/Azure to have an unbiased approach to CMP?
3. How much time could it save finance departments with chargeback?