I bought two of these pillows from the MyPillow website just a few months ago. Based on our T-shirt sizes and sleeping positions, I ordered two firm pillows, for DH and myself.
I have to admit to being an insomniac, and MyPillow has not cured that; however, the very first morning I awoke after a full night's sleep, while still sitting on the edge of the bed, it struck me how much more rested I felt. It was very noticeable. When I do sleep, the quality of sleep I get from this pillow has been consistent, not a temporary 'new' thing.
My DH, who always wanted a wafer-thin, 'dead' pillow, balked mightily at the sight of his new one. They are surprisingly fluffy. He readily admits now that he's glad we switched and agrees the sleep quality is much better.
While I agree returning two of these pillows would be a nuisance, it would be surprising if you wanted to.
P.S. I forgot to mention the pillows from the website have 2" gussets. Also, we received two travel pillows as a bonus. 
Strive for respect instead of attention. It lasts longer.