I have been using my CPAP machine since Feb 2009 and have not noticed a major difference in the way I feel. I have used the Mirage Quattro for approximately 6-7 months however found that it doesn't seal completely, I ordered the Fischer and Pankel which didn't work, I used the confort gell from Respironics and that didn't help either, I used the Mirage Liberty and woke up gasping for air so I am back to using the mirage Quattro. Any other suggestions on masks.

