Ok... so I went with my partner to Vegas this past week for a family trip. We vaped fairly openly at JFK airport in NY and then a little more discreetly on the plane (US Airways). We vaped in Vegas at all the casinos. Some peope had questions, but many also knew what it was already... which was much less aggravating while trying to gamble! A lot of people knew people using them already. We vaped at McCarran Airport and again on the US Airways flight home. No questions, no problems. Was great!!! Even used my passthru at the craps table a little when all my batts died!