They work surprisingly well, so I've built a free simple tool to embed them on websites. It has no dependencies and simply uses fetch to communicate to my backend which proxies openai.
In the future I plan to add more widget embedding options (currently only chat is available).
Let me know if you have any specific questions about either the tool or openai assistants in general.
Show HN: Rispose.com – A free tool to embed OpenAI Assistants on any website
rispose.com