There is no visual element to go back, only to loop through the category again.<p>I can go back using arrow keys after making an error, but I didn't even know that was an option until reading the comments in this thread since I so rapidly skimmed through the introductory headlines. One doesn't expect to learn about a new/foreign navigation method under a headline titled 'SUPER DUPER SIMPLE', and so I missed it entirely.<p>The geo-locate area code, while maybe convenient for some, is creepy. I'd prefer another set of '555' 's or (xxx), but that's probably just me. I don't need help remembering what area code my primary phone number is within, and in my case the suggestion was incorrect anyway.<p>I very much like the styling and the liveliness of the UI otherwise. It feels very polished.