I bought my mom oxygen machine from LPT medical after less than a year it broke. They offered to buy it back for $1600 and offered me another machine. I accepted. After receiving the new machine found out it was faulty from the beginning. My mom Oxygen would drop to the 60s while wearing it so I called them back and I told him that it's not working and I need another machine so they replaced it for me. They have received my older machine, February 13, and so far they have not refunded me anything. In fact they told me that I misunderstood and the refund would be 600 then they changed it to 200 and now we're settled on 100. If I haven't received a machine from them I would've said that they are scammers I would never buy from them again I lost so much money time and energy and my mom's health dealing with this company. I would never recommend this company to anyone.