Processing and facilities:
The material is extremely high. One senses that Billingham here attaches great importance to deliver a technically perfect bag. The seams are clean and absolutely blameless. The leather is soft and supple and will definitely age gracefully. The interior consists of a small camera use in dark green, which is padded properly and can make good by the "divider". As a further plus point I see the possibility simply hive off the entire application means of a pushbutton. This is an absolutely rewarding solution for me because I also from time to time use the bag in everyday life.
Capacity: The bag is relatively small. I knew but of course before you buy, and exactly that was intended. At the beginning I did it as a Olympus OMD EM 10 with an attached handle incl. Panasonic 20mm. 1.7 and Olympus 45mm 1.8 transported (both lenses with the respective lens hood). For this purpose from time to time even a simple shoe mount flash came. Personally, I was so perfectly equipped for any photo opportunities. In the two small front pockets I had usually the accessories (spare battery, memory card, a small notebook) and rarely even behind the photo equipment the iPad.
Meanwhile, a Sony Alpha 7 has moved in with me. Clear lenses are slightly larger due to the small picture format here but this in no way detracts from the quality of the bag. Usually I use it now for street photography and city trips or events in the private sphere (where a backpack just bothers). This then is the Alpha 7, and two prime lenses (Canon FD 50 1.4 and 28 2.8 Canon FD) plus the usual small stuff (battery, memory card).
Conclusion: Nice small and light, perfect workmanship, ingenious designs and for me personally one of the best camera bags at all.
Important: Who calls a DSLR its own should possibly use the larger model. Here the place is otherwise very closely.