Ok? Circle!

Don't judge: I'm slightly obsessed with point of sale credit card hardware/software systems. Every store has one. Most people encounter at least one on a daily basis. The experience should be fairly intuitive and straightforward. However, one of the biggest mysteries of modern technology is how so many vendors get the user experience wrong.

This is a photo from H&M that I captured earlier today. Note that the screen is asking me to confirm a purchase. My first reaction was that I was digging the conversational tone of the message. Then my eyes searched for a nice big green "OK" button. There was none to be found. Then I scanned for a "Yes" button. Nope. Hmm I was stumped. Turns out the circle button was the correct one to press. Seriously???