I have a size 12 pair of Dad Supreme tennis shoes. I have been wearing them for a about a year and nothing seems to break them in. They stay firm. That would be okay if it wasn't for the fact that they are made narrow. My foot is slightly wider than normal. I don't know remember the width, but normal width shoes are usually snug on me. Usually shoes I have purchased in the past have broken in and comfortably accomodated my slightly wider foot.
If you like a shoe that stays firm and you have a normal width or narrow foot these would be good shoes for you. There is significant padding inside the shoe. It is very firm. The shoe also seems to have decent arch support, although I don't have bad arches.