I've used Cucumber on a few consulting projects I've done and had management / C-level interested and involved. It's a pretty narrow niche, but they were definitely enthusiastic for the idea that we had a defined list of features that we could print out (!!) as green or red for the current release.

They had some previous negative experiences with uncertainty about what "was working" in releases, and a pretty slapdash process before I came on board, so it was an important trust building tool.