The only places I bring my Swift indoors are at work, on the train and the back of my car. Other than that, it stays outside where (IMO) bicycles ordinarily belong. I always have a lightweight cable lock on the bike in case I'm stopping at a suburban store where the security risk is low but I still need to prevent a crime of opportunity. If I know I'll be going somewhere with moderate to high theft risk, then I'll bring my Evolution Mini in my backpack. Still haven't rigged up a way to mount it to the bike, though I probably should eventually do so.