I'm really considering the purchase of the Synapse 25. I saw on it's page that they recommend a Tri-Star Medium Packing Cube for carrying an extra set of clothes for a carry on. They do say that this is for the elastic pocket on the inside, but I'm not too concerned with a packing cube fitting in there.
Does anyone have any experience with Packing Cubes and the Synapse 25? Is a bigger packing cube going to work?