Content of this course is really good. Only obstacle I can think of is price. Conversation is one of the basic element if one want to create production quality bots. This course covers the conversation design in detail. Maintaining the state using context is explained really well. Most important takeaway from this course are challenges of slot filling and using session variables. Other benefits of this course: 1) Adavantages of using 1 lifespan of the context, 2) When not to use followup intents 3)Using session veriables to maintain parameter values.
Yes, (I recommend this course). In fact i am upgrading my current subscription to Dialogflow Toolkit. Its one of the best content to learn bot development.
Review for Intro to Dialogflow ES