Reviewers broadly see Calendly as a dependable, easy-to-use scheduler that saves time by replacing back-and-forth emails, handling time zones well, and working smoothly with calendars, Zoom, and client booking flows. It is especially liked for external meetings, demos, consulting, and distributed teams. The main complaints are about limited customization, less intuitive feature layout for more complex setups, occasional booking or notification issues, and weak post-booking workflow. One reviewer also called the interface dated. Overall, people trust it for straightforward scheduling more than for advanced coordination.