What’s the real-world success rate of AI in customer experience?

I’m curious how far we’ve come with AI in customer support beyond the hype.

From my limited testing, AI can cut response times in half, but it sometimes creates “hallucinations” that annoy users.

So, has anyone measured actual success metrics (CSAT, NPS, resolution time) after integrating AI into their support flow?

Would love to hear studies, numbers, or even personal experience. I’ll share ours in the comments if there’s interest.