Yes. Used it for a a couple of large projects at BigCo. Was actually brought in to "polish" a few things. One of the original team members thought it was cool. It was a disaster. Uncovered issue after issue. Convinced management to run a bug bounty program through hackerone and I'm going to let you guess what happened.

If you're so brave and confident find a good pen tester and let them have a go at your api. It's a humbling experience.