I bought two months ago a small black
Billingham bag (special edition for Leica) and have to admit that this bag is nearly perfect - they sell the Billingham bag mainly at Leica sales points. In addition, you get a fabric "pocket of protection" for your bag with a giant embroidered Leica logo. And here is a guide how the pouch is packaged properly. (btw: thanks for teaching how to use this bag correctly, as if I would not know that already.) The bag has space for two camera bodies and a spare lens or a body and two lenses (even a dissimilar non-Leica camera lika a Nikon S3 and a external mounted 21mm viewfinder or a Contax G2 will fit properly - even the huge xpan will just fit and and they are also not repelled because they are not just Leica - just joking). In addition, there is a separate lockable compartment for the film cans, glasses, pens and even a paperback.
The bag is, like any billingham pocket, flawlessly finished, upholstered and with a discrete appearance. And for me it's the perfect bag for everyday use. The only drawback - the high price (just Leica).