The take anywhere camera seems like a great idea, but what I have found is that I seldom take any photographs worth keeping. Whether that is because I just can't get serious enough to do good work, or the camera just is not a great tool, I do not know. What I find is if I take cameras I like, I will do good work. I just learn to carry the camera so it is comfortable and convenient. I have found the size of the camera is not really the impediment, but whether it is easily accessible. If the M is your thing, then carry that. It really is not big--isn't that the M's benefit, not a big DSLR? If you want a pocket camera, use an iPhone.