It's a bit tough for me, as I live in S'pore where import, sale, or distribution of e-gigs is prohibited. (according to the SG Customs Facebook page however, it's
not an offense to use one
13 warned or fined over e-cigarettes | Facebook 3rd para from bottom)... this should more or less be the 'official' stance, as SG Gov now flaunts it's online social-network presence, and through observation I've noticed they have a 'zero tolerance' for error... esp in print. That said, I've heard of people getting busted and fined when caught by the police.