It's funny how the reviews are 1 star or 5 star what's up with that. They got me for $795 for oxygen rental that I never did use sat there for 6 months tried to give it back but they told me i had to have a doctors release which took a month.insurance was covering it gave the equipment back and they charged an additional $795 For what I had canceled it a month prior. You can buy the same oxygen generator for a little less than 600 on Amazon and you keep it. Never ever will I use lincare for anything. You can buy your own cpap online as well and take it to your doctor to have set up. DON'T USE LINCARE