Reviewers mostly see Loops as a simple, developer-friendly email tool that is quick to set up and easy to use for newsletters, onboarding, transactional messages, changelogs, waitlists, and event-based emails. They repeatedly praise the clean interface, smooth editing flow, solid docs, responsive support, and the ability to handle both marketing and product emails in one place. A few caveats come up: navigation can be confusing, the editor and UI can feel buggy or too bare-bones, some features are missing, and it seems best suited to SaaS rather than broader use cases.