Really like the AirCurve 11. So much more comfortable than the AirSense, With the AirSense, I had constant issues with dry eye...to the point that I could hardly open my eyes in the morning. Also, I spent most of my morning with a dry cough. I think both of those issues were caused by the constant high pressure air flow. The AirCurve11, being a BiPAP, decreases flow when you exhale......which has made a huge difference. The coughing is gone and the dry eye issue is significantly improved.