I've tried 3 other mask types that included a traditional mask, nasal pillows, direct seal before trying the Dreamwear system. It's the best system by far. The nasal interface sits at the nostrils comfortably w/o irritation. The air is distributed through both sides of the soft silicone tubing. This allows for the ability to sleep one ones side or tummy w/o annoying air leaks. Everything snaps apart for easy cleaning and if needed, replacement of any individual headgear components. This eliminates the need to replace the entire system. I can't say enough good things about Dreamwear.