Its interesting indeed just how many flyertalkers need or use chemical substances in order to allow themselves some brief form of sleep. This is for me in itself , a particularly damning indictment of Premium Class air travel. I suppose if you're travelling in the back of the bus, wedged between fat rolls and saliva waterfalls, popping a few valium, xanax, ambien, or whatever works will give the same benefits to the poor man in Y as his breathen in the pointy end of the plane--comfortable oblivion but at a third of the price