I like that it has an easy to use interface, which makes setting up appointments fast! The ability of being able customize all aspects you need in your business with such ease was one thing i liked most about this program!! There's nothing much negative at least from my experience. Highly recommended if u want something simple yet efficient when managing bookings. ! You can have multiple clients under single account so as long they are linked through email id or phone number then everything will be synced automatically. !!