I worked for one company that used it. Everybody on the ground hated it but the costs of migrating away were enormous because every system they relied upon was tightly coupled to every other system. It would have been a multiyear project to get off it.

Their software wasn't just more expensive than using open source equivalents it was worse, too. It's just very, very sticky.

At the same time the sales team wine and dine key decision makers and try to strike the fear of god in to them so they don't rock the boat.