I have this pattern, I make a lot of bags, and while I haven't made this one, I think it is more stylish than a diaper bag. My only concern would be that it doesn't zipper closed....
Just use it, know it's unique.. Often when I travel with one of my custom bags I get lots of compliments. I would advise spraying it with Scotchguard to protect it from having dirt stick to it requiring frequent washing....