We can make stow our bags and still had storage space left:
1 pair AERIS Mako Fins (even size XL fits fine in)
1 snorkelling
1 mask
1 pair of water shoes
1 Digicam
1 Sunscreen
1 pair of swimming earplugs
1 Ipod
1 newspaper
What I find particularly good, the bag can be both taken in hand, than be worn as a backpack.
I can not give any information, as the next vacation is still to come, but the workmanship looks solid on the shelf.