My DD, then 10, begged for a My Pillow after falling prey to the commercials - I agree with some of the previous posters, I think they are pretty pitiful and she didn't like it either. It lays under her loft bed because with the price, I hate to get rid of it, but nobody seems to want to use it.
I don't own one, but I went to a Sleep Number store once with a friend who was interested in their beds. They have tons of pillows that they sell based on your wants/needs, and you can lay on the beds and try them out (at least you could pre covid). With investing in a good pillow, that might be a good way to at least try it (but I realize pillows often feel good at first and then... it can change)