Respectfully, this doesn't reflect my experience at all. I live in Chicago. I was referred to a sleep specialist, saw them, had a sleep study (the Matrix wiri

Respectfully, this doesn't reflect my experience at all. I live in Chicago. I was referred to a sleep specialist, saw them, had a sleep study (the Matrix wiring and unpleasantly early sleep time is accurate, though), got my machine, set with the sleep study's calibration, and began sleeping with it. No additional sleep studies for calibration. Or, to put it another way, for me, it was 1, 2, 3, and a not-as-long-as-you-describe 5.