Anyone using RimeAI for customer support? Real-time TTS latency questions

We're evaluating RimeAI for our support center and the real-time TTS aspect is appealing, but I'm curious about actual latency in production. Are you seeing sub-200ms response times in live calls, or is there noticeable delay? Also wondering how it handles accents and technical terminology without sounding robotic. Any gotchas we should know?