Reviewers mostly praise Pi for warm, human-like conversation, saying it feels supportive, smooth, and easy to confide in during hard times. Several highlight its natural-sounding voice, fast responses, and seamless use across phone and web, with some calling it better at companionship than work or learning tasks. The main complaints are narrower: weaker performance in languages other than English, including an English accent in voice, stricter guardrails that can cut off light chats, and a few account syncing or device compatibility limits.