I use my G9 pretty much as Michael describes, as a 'notebook' to catch visual ideas. As a result, I use it without any attachments and this case is perfect, it fits like the proverbial glove. It would not work with anything attached. As it rides on the belt, during wet weather it's protected by my coat and the material seems to be reasonably water resistant. The big advantage is that the camera pretty much disappears until I need it and is very secure.
Ed