We're using Storm to handle high volume Kafka feeds to process advertising bid requests and other user data in machine learning models. Most of it is proprietary, unfortunately, so I can't write the article you'd like (and that I would have liked before starting this).

So far Storm is working as advertised. Frankly, what it does isn't that terribly difficult, but it's good to have a well-tested implementation of it so we can focus on our business logic.