this is the worse company to do business with. My wife has to be on oxygen 24/7 and for the 3rd time my wife has run out of bottled air. this being thanksgiving week no one is in the office so I can not make arrangements to have any delivered. Since she has no tanks, we can not go to thanksgiving dinner at my sisters. The automated system said delivery would be made yesterday but none was. shame I can not give this company a negative rating.