Difficult to use on phone. Their pop up's for ticket insurance and acceptance of policies stay open, blocking 75% of the screen. My keyboard pops up, I can't see the fields that need to be filled in. I'm filling in my cc information blind, unable to see what I'm typing. These pop ups COULD disappear once boxes are checked. There's no reason for them to block everything. Totally frustrating. I had to fill everything out more than once because I couldn't see what was was typing.