I used the machine for two nights, skipped 2 nights (it takes some getting used to, it's like having a new bed partner!), then by yesterday evening I was feeling out of breath and sluggish again. I used the machine again last night and I awoke earlier, and more alert than I can ever remember.

If I were you, I would try the machine BEFORE surgery, for 2 reasons, as I also debated this point: 1. you avoid surgery, which always carries the chance of complications 2. I spoke to a cousin. he had surgery, after his father had surgery. His father (my mother's brother) snored so loudly, the entire nursing home floor was unable to sleep! (he had a stroke in his 80's, but he had always snored.) So he didn't have a choice! After my uncle's surgery, my cousin chose to have surgery, as he had the same problem. On the phone, he said to me, "And now my nose is clear, listen: SSSnnnifff!" It did not sound very clear to me. NOT AT ALL. My nose after the machine sounds much clearer: 'puf puf' See? Okay, I am beeing a little silly, but I just was NOT impressed with his nose.

Anyway, I even stopped having constant nightmares, and the lessening of anxiety upon awakening, my therapist attributes to waking up during the proper sleep cycle and less sleep apnea. I'm a believer! Good luck, feel free to contact me or ask me any more questions.