Reviewers see Eraser as a fast, polished diagramming tool that helps teams think through complex logic, user flows, system design, and architecture earlier in the planning process, not just after requirements are settled. They repeatedly praise the clean UX, strong visuals, useful icons, AI-assisted diagrams, and team sharing for speeding up documentation and remote collaboration. Feedback is overwhelmingly positive, with only a few limits mentioned: mobile editing is close to unusable, and some users want more diagram types, such as mind maps.