This company is terrible! My mom purchased a portable oxygen machine from them. It was brand new and not a cheap piece of medical equipment. However, as she suffers from pulmonary hypertension she is tied to an oxygen machine 24/7. This has naturally made her depressed and often feeling trapped. This machine was the answer to our prayers. It gave her around 4 hours of being able to be out and about without concerns of running out of air. Well, the machine has broken down three times and they've yet to replace it. They "repaired" it but it broke two times after. At this point they should replace it. However it's been a battle to get any answers from customer service and everyone she talks to makes her a different promise. It's been nothing but stress and disappointment! Avoid buying anything from this heartless unorganized company.