I ordered two My Pillows and upon using the first night, I woke up with a stiff neck and a horrible occipital headache. I tried using it several nights after, and I even experienced sleep apnea from hypextension of my neck. I went to see my Doctor and he explained that for me, it hyperextended my neck and that I should instead buy a feather pillow. My Pillows are not what they profess to be... just a gimmick and no different from any other cheap pillow. I won't buy them and I encourage others not to buy them as well.