The host should be a SUPERHOST on AIRBNB if he's not already. The true star, of course, is the FLAT. If you want OLD world Parisian charm (beams on ceiling, amazing views of Paris at your feet zinc rooftops, a 6-road intersection steps from your doorstep, Metro within 60 seconds, creature comforts of free wifi calls landline worldwide, super-fast, steady internet, washer/drier, fully equipped kitchen w/Nespresso maker and teapot, separate shower/bathtub, and the quaintness of NOBODY around you being on the roof, THIS IS IT.