This is a new complaint against Preferred Homecare of Mesa & Glendale Arizona, that again concerns defective Oxygen Concentrator and wrong supplies and poor service. My Invacare Oxygen Concentrator failed to work properly and is sending large drops of water and some type of grease all the way down the Oxygen Supply Line and Nasal Cannula. I have also filed yet another formal complaint with my HMO plan, Mercy Care Advantage on this matter and as of Feb 16, 2011 I notified Arizona Adult Protective Services of this matter and possible... read full review »