Oh yes. After ages trying and failing to find one of my existing bags (really don’t want to spend more money on bags!) that is comfortable with all my slings, I have failed and am constantly changing the nappy bag around. Most of them are ok into town or whatever, but to walk further – as I often do – is a complete nightmare 
To solve this (I would think) I want one of these. In brown and blue. Only I can’t justify £65 on it
Another thing for my Xmas list.