Protection is so good. I drop the bag to the floor (1.5 m drop on concrete) with my camera in it! Nothing happen to my Fuji X10 :-) The bag and the leather aslo do resisted well against light rain, I found no rain or humidity inside the bag. Of course it is not waterproof, so be careful of heavy rain.
Load the bag is not heavy in itself and the shoulder strap even though quite thick is pleasant and do not hurt after a long walk.
I was looking for a nice bag for Storing and protecting my Fuji X100 When I'm using it with IT lens hood put on + the dedicated Thumb + a boop (as then I can not use the Fuji leather case Which become too small). There is internal speration provided to store smaller camera, I've removed them. So now my Fuji X100 fits perfectly well in it (including the Fuji leather strap on top of it) and as room is just left a bit on the side I can Easily add my Fuji Flash EF-20 (stored in a small leather pouch so Not to scratch my Fuji X100) Best thing Intended at the moment of the decision purchase.
Hence I'm very please with this leather bag. A very good camera bag. I'm recommending it strongly to Fuji X100 / X100s users looking for a good bag.