Since becoming pregnant, I've become really anemic and have started to have to do iron transfusions. However, when I'm home, if I do too much, I feel extremely out of breath. With this machine, I'm able to just sit down and relax but still get the oxygen that I'm needing. This machine is really easy to use and while there are times I can use the nasal cannula, there have been times I need the non-rebreather mask. With this machine, I'm able to use either one. I get the oxygen that I need and so does my baby. The machine is a bit heavy but nothing too bad. It's really easy to turn on and if I need it running for a couple of hours, I'm able to do so without it overheating or turning off in the middle. Super helpful and so easy to program.