This is by the far the best mask I've used. After years of CPAP therapy using the Resmed nasal mask, I decided to give nasal pillows another try, only because I was getting skin breakouts from the nasal mask. I slept better with the resmed airfit P10 pillows than I had in a long time!! I could change position without waking up and it needed little adjustment. My AHI went down markedly, My machine did adjust for the more limited flow than a nasal mask by increasing my pressure slightly, which I expected. These nasal pillows have been a game changer for me, I recommended them to my son and he also loves the pillows, and his mustache did not affect the seal. Getting the kit of 3 is good because you're guaranteed to have a fit. I then found out my sister was also using these pillows and loves them.. I highly recommend them and am absolutely thrilled!