I've tried a lot of different masks, but this one is my favorite so far! Even though I received the wrong size and slept with it a few nights, I can tell once I get the sizing correct, this will be the one I stay with. It is so comfy, the cushion and seal are soft, the seal is tight and it's nice having a string to pull when I want to remove the mask. It seems to adjust nicely to sleeping in all positions as well. And it seems professional, a true piece of medical equipment, not a cheap plastic device like one I had tried previously. It doesn't blow air up into my eyes and doesn't mark my nose or face. It is quiet and I slept nicely with it. The chin rest kept my mouth from dropping open and that helped with a dry mouth. I really really like this one.