The first time using Osaka Amazing Pass it was a bit difficult when entering the train because the QR code can only be accessed via email so it cannot be shared with others, and at one time you can buy a maximum of 4 tickets, it is better to buy with different emails, because I bought with the same email for 8 people so it was a bit complicated when showing the QR code, because it cannot be screenshotted, if sent to another email it will ask for verification so it was a bit complicated. But after a while you get used to it and know how it works, it is easy to use when at attractions such as Dotonbori Cruise (must exchange tickets), Sumida Sky Building before 2:30.