Reviewers mostly see Spellar AI as a practical speaking coach built into meetings: they praise its real-time tips, filler-word and mistake detection, meeting notes, and post-call feedback for improving English, pronunciation, presentation skills, and confidence. Several say it fits naturally into daily calls and works well on Mac, with some noting clear product improvement over time. The main concerns are narrow but concrete: one user reports recording issues with Zoom and AirPods on Mac, while others want stronger privacy controls, local processing, and broader platform and language support.