That's cute but I don't think it would be all that comfy. I would probably sew it up higher to the lower back. That way she would look cute crawling or sitting. Id probably also run a 7/8" ribbon strip all the way around and make the bow detachable or interchangeable. Then the front would look as cute as the back.
I think I might have to try that today with my new onesies!!! Thanks for the link