Reviewers mostly see Calendly as a dependable, easy scheduling tool that saves time by replacing back-and-forth emails with a simple booking link. They especially like its calendar and Zoom integrations, smooth handling of time zones, and usefulness for client calls, demos, consulting, and everyday meeting requests. The main complaints are a dated or unintuitive interface, limited flexibility for complex scheduling, and gaps around notifications, customization, editing shared links, and occasional booking conflicts. Some users also want stronger post-booking features like follow-ups or notes.