Reviewers mostly praise HeyGen for making AI avatar videos easy to produce, with especially strong feedback on realistic avatars, useful dubbing and translation, and time or cost savings in content production. Several users say it fits smoothly into marketing, course creation, and social workflows, though some note flat voices, repetitive templates, and a need for better scripting or emotion control. The main tension is reliability: a vocal minority reports broken lip sync, slow rendering, confusing plan limits, moderation blocks, credit issues, and weak support, while some regular users say support is responsive.