The Yepp Maxi does not fit over the cargo bags. I didn't pay enough attention to this and wish I had. I wonder if Rad is going to come out with cargo bags that somehow work with this setup? Rad says that the pannier works with the Yepp, but when they are reasonably full they smush my child's feet and don't work if the seat is in the back and the bags in the front. Note in this set up you can only have one child in the seat and the bags, another child's legs don't fit comfortably with the bags.