That's why I like the stadium shows. A beautiful day (though I'll admit I've never had to deal with a sucky-weather one for a show, luckily), a lot of GA. And you don't really need to camp out unless you absolutely need to be front-y--front-front. Looking above and around you doesn't make you envious of the seated, but instead adds to the experience of it all; wow, look at them waaaay up there!
I am middle-aged and will call myself middle-class, but can't quite bring myself to pay the 300 a ticket...especially since I want to bring my teen this time around and $600 is like two airfares or summer camp, yikes.
I can't use an app (only have a laptop today!), but did finally somehow work around the ticket loading and payment issues, and got a couple tickets in the lower bowl at Chicago 2 for the 2nd level pricing, so "merely" $100 a ticket.
It was probably completely coincidental but when I tried linking to the ticketmaster page through the U2.com tours-page link, *then* it all worked properly, including payment, when it had not done so before (error messages in the payment and trouble getting past the spinning wheel of less-than-1-minute purgatory).
I probably jumped the gun a little, but decided that for the fairly 'reasonable' price I would just go with whatever right behind the red-zone means...either very very far away from the main stage and a good spot for some small percentage of the show or, something else, who knows, given how unclear the stage set-up is on ticketmaster. But at least it might feel okay to a daughter who is a newbie to arena shows of this magnitude, I'm hoping, since it's not up in the sky or on the floor!