We tried using the "tradeoff Analytics" service for the project - and I must say , the tools and help available around it, the API and its documentation is pretty bad , convoluted and unusable. This is true too other services available through watson too.
We looked into IoT ( Internet of things ) as well . And once again , ran into a ton of dead ends without being able to proceed. The API documentation and examples just suck . If you are used to playing around with well documented APIs / Tools / Languages - this is going to be frustrating.
If the OP is the person who actually wrote the article , please please please go back to Watson Dev Cloud or BlueMix and try it out your services and APIs an a consumer.