Have used one for several years--set mine on a wooden chair. The only problem I had was fitting the nosepiece together correctly after cleaning. For almost a week annoying squeals and squeaks disturbed my rest. Then I discovered I wasn't getting the triangular plastic frame seated correctly. Once that was solved, I became accustomed to the CPAP quickly.
One of my meds. is causing hot-flash-like symptoms now so I direct a small fan toward the head of the bed so I don't sweat so much I slither right out of the head gear. :roll: :roll: :roll:
Stick with it......absolutely worth the adjustment you must make. :thumbup: :thumbup: :thumbup: