What you end up with is incredibly unappealing-looking, but the texture is that of a totally ripe banana! And considering banana bread typically calls for overripe bananas, this is a pretty solid way to make sure your ingredients are all up to par.
As for eating, we fridged this bad boy right after it came out of the microwave because, frankly, hot bananas are pretty gross. And once it was cooled, it was fine! So long as you can get beyond your prejudices about what a beautiful banana should look like. It's 2016, for cryin' out loud. Enjoy.