Bamboo is being used by CDK Global as the primary tool for continuous integration and delivery. We use Bamboo for the build servers at our company, and to deploy to the cloud infrastructure for promotion through various environments like development, development integration, performance, quality assurance, staging, and production.
Bamboo is used across the organization for all R&D of new products. CDK is working to transition all products to use Bamboo, but it has a lot of them. Bamboo solves the problem of needing to build a product in a reproducible way that is not dependant on anything that exists on an individual developer's computer. It allows us to deploy a deterministically generated image from a central location. I think that Bamboo is a good product, but CDK could make better use of it if they could start all over, but they are sort of stuck with the current implementation they have because it is hard to change quickly.