Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good for naps but not all night

I bought this pillow and was very excited about it as I have always been a stomach sleeper and staying on my side was a real challenge. I slept with it for about two weeks and though some nights I would stay in position most others I would have to reposition the pillow several times. Not too much of a problem. I haven't slept straight through the night since I got pregnant. About 1/2 way through the 2nd week I started getting excrutiating headaches. I finally went to the doctor and she stated that they were caused from stress and strain. Turns out I spent the better part of sleeping hours "fighting" with the pillow to change position. I quit using it at night and my headaches have gone away completely. It is great for taking naps where your less likely to toss & turn. And I love it for laying in bed and reading. It's still better than having 6 pillows on the bed but I don't recommend it for people who naturally shift a lot in their sleep.