I have used several different types of CPAP pillows and recently thought I’d try this one. I have found it to be the most comfortable by far! Its adjustable layers allowed me to customize it to my likes. The soft side and the cooler side are both really nice. The unique shape works the best of the ones I’ve tried. Back, side, the occasional stomach positions are all comfortable. I thought the tether for the CPAP tube was silly, but it actually keeps the tube weight from pulling to the side of the bed.