This company is by far the worst I have ever dealt with. Their billing process is terrible. I returned by CPAP machine over a year ago, partly because the company is so inept. They would send the wrong equipment and their customer service is terrible. Out of the blue, I received a bill today from last year. As I said, I returned the equipment over a year ago, settled my account, and then today, I receive a bill. Terrible company. Stay away! It doesn't even merit one star.