The most valuable feature of IBM Watson Discovery is testing, mainly because the product applies conversational AI, which means I can ask questions to get the information I want from a specific test area. Then, I'll receive a conversational answer from IBM Watson Discovery, even if I ask the question in a non-conversational format.

For general use cases, the product is okay, but for more technical requirements, that's still to be determined.

The most valuable features of IBM Watson Discovery are the integration with the rest of the Watson Suite and the Watson Assistant capability. If you use Watson Assistant, the ability for it to be able to determine the accuracy of your voice models and your voice response systems is a benefit.

Language support and the ability to build a natural language of speech recognition are the most valuable features.

Being able to have some rules to extract the entities is valuable. The capability to crawl external sites and internal documents, and then draw internal information with external contents is also valuable.