I'll have to post pics later, but:
I got my Synapse today. I've just swapped my stuff from the Brain Bag to the Synapse while I'm home for lunch.
The Synapse holds everything I really need from the Brain Bag, even when I cycle, so I think it's going to work out really well as an everyday bag. There's room for a pair of tennis shoes, even with the main compartment currently holding a U-lock and rain jacket, and I'm pretty sure there's also room for me to bring home dirty clothes in that space on the days I cycle (when I wouldn't have tennis shoes in that compartment).
Love it so far! :D

