I tried booking through the app. When I clicked purchase hopper then came back and said oh sorry we don't have enough seats anymore please choose another flight. When I did... that flight was also booked. But u don't find that out till u click purchase. Now I have no flight and hopper charged my card twice for over $1300 dollars and now I have to wait for them to release the pending in who knows how many days. P.s. they have no one u can talk to to fix issues like this. ThEY ARE TERRIBLE