I have used this for going on 4 years at Night. Gives me relief.. Sometimes very annoying though. Supposed to use it for 4 to 6 hrs.---it varies for Me.

I have been using the trilogy 100 for several months. If you have been using a cpap then you should not have trouble using it. Took me a while because of anxiety and mask air leaks. Still have trouble with air leaks. I do not have to use oxygen as much. Mostly with strenuous stuff. Also helps a lot with shortness of breath. Have more energy. I highly recommend it. The air is not constant fast air. It inhales and exhales for you and helps rid carbon dioxide. Hope this helps.