Ask HN: Do you use live chat widgets on your site?

I recently discovered a chat widget with a generous free tier that covered all of my needs. The goal was to have 2-way communication without the user needing to give their email address. After testing out the service and customizing it to my liking, I removed it from my site and closed my account. Mostly for the following reasons:

  - It uses cookies and my site doesn’t do any other tracking or have analytics
  - The UX wasn’t great, the best I’ve seen but still unintuitive.
  - It was annoying to allow in my content security policy
  - It slowed down my site
  - From a user’s perspective I find them annoying

So I’m wondering, has anyone found a service like this worth using, or that they genuinely like? What is your use case? How does it work?