I've written a review of my VO Croissant bag here. It is a small bag, because it was meant to be a small bag. I find the quality to be on par with the Berthoud it resembles (I have examined them side by side).

As far as larger bags go, I have both a Carradice Barley and a Zimbale 7ml bag, and both are great. But the VO Croissant is perfect for those bikes/occasions when you don't want a full sized bag.