Chatbots + Dialogflow

Hey all,

I’m a little confused by all of the various chatbot builder services around and wanted to see if anyone here had any suggestions.
I’ve worked with Dialogflow before and I found it’s pretty straightforward with mechanical cut and paste interactions, and I’ve heard that Open AI can integrate with it to really make use of the NLP capabilities. I’d definitely be keen to explore it, but can anyone confirm that this is a solid solution?

Are there any major cons that I need to be worried about?
Are there superior configurations?