When I attempt to checkout as a guest, the app froze on the adding payment option. There is also a bug when you continue as a guest and it pops up a window forcing you to sign up or sign in when adding an item to the cart. Only when you click on sign in and back out did it bypass the bug. In the end I couldn't check out as a guest, lost all my items in my cart, had to sign up to the app then it worked.