I use a canvas bag like this which is 28€. Since the Leica lenses come in nice leather pouches they are already protected and I have a neopren cover for the camera. Adequate and light for city walks and sightseeing, but I would not mind buying an Oberwerth Freiburg. In daily use I tend to take the camera with one lens attached over my shoulder and an extra lens in my pocket or I take my Thinktank Retrospective 5. The temptation to buy a better bag is there, but I do not feel the necessity.
Yes of course, this is probably the ideal kind of bag. Of course as we are talking about Leica Q cameras here, there is no issue about lenses but if one wanted to carry lenses then much better than the rather bulky Leica lens cases are something like this https://www.amazon.c...=I1KASFY3PM4V98
which are nice and lightweight, and don't take up a lot of extra space and which would fit comfortably into most bags.
I think the fact that the bag you have pointed out is cheap but especially because it is lightweight, makes it the ideal kind of thing to carry around if you want to feel relatively unencumbered whilst taking photographs.
In response to User:paxao
, above, his suggestion of a plastic carrier bag is interesting but of course it lacks structure. Nice and light though and less likely to attract the attention of possible thieves in Milan.
However, he seems not to have taken into account the real problem which is that it doesn't have a shoulder strap and this means that he would have to carry it by the handle and that would leave him only a single hand with which to hold the camera while taking pictures – although this might not be too bad if he used good light and fast exposures most of the time.
The stabilisation and auto-focus will probably help. Good thing that it's a Q - and not an M.