Deepfriend is praised for its innovative approach to mental health support through its AI, Bubbles. Users appreciate the engaging and enjoyable therapy-like experience it offers, likening it to a health-focused version of Duolingo. While some note the need for further development and additional features, the app's potential is widely recognized. Bubbles is described as an intelligent AI that provides satisfying interactions, making users feel like they are engaging with a professional. Overall, Deepfriend is seen as a promising tool for mental health improvement.