Booking activities on Klook is very convenient. The shop will contact you in advance to confirm your health status, the time between diving and flying, and accommodation needs for other days. The accommodation is clean, well-equipped, and comfortable. Theoretical lessons and tests are basically completed online, allowing you to study at your own pace and according to your free time. The instructor is very friendly, teaches and adjusts as needed, and also takes many photos and videos. Both the calm water and open water sites for practical lessons have beautiful environments. During my learning process, I saw corals, various fish, sea urchins, octopuses, and sea turtles. Overall, I highly recommend everyone to participate in this activity.