Super invasive and annoying because you can't do a single thing about it. At least with the regular ads you can actually click on the right arrow of the window and it'll expand, letting you see the entire email. But whenever you get an email from Spirit, Southwest, Kayak or anything else to do with travel, this uber annoying "ad" pops up that takes up half the screen where you can't even read your email. AND THERE'S ABSOLUTELY NOTHING YOU CAN DO ABOUT IT!!! There's no arrow to click to expand the email. You either have to drag the bar back and forth to read the email or just give up on it. Very annoying. NO ONE IS GOING TO USE YOUR STUPID YAHOO TRAVEL DEAL .....BECAUSE IT'S STUPID AND INVASIVE AND INSULTING. We don't need your help to book travel, believe us.