Pretty easy to book. Customer service (via WeChat) is very responsive. Just be aware that you need present passports and get the ferry tickets from the ticket counter.
The order is very simple, and there will be a follow-up flight and ferry ticket time with the travel agency soon. Ask questions are very professional, and the pick-up driver is also very polite. Due to professional service, you can spend a lot of time and spirit, buy your own tickets and check the boat class. I feel very convenient.