we bought these along with a memory foam mattress topper and though I love the mattress topper, these have taken more getting used to. They are very firm and I find that even one of these and one normal elevates my head too much and hurts my neck. If you only use one, though, you soon get used to them. I also think they'll be very durable as I've often found that other pillows so go "bumpy" and uneven, whereas these do hold their shape. If you sleep on your front or love very soft pillows these are not for you. My hubby likes firm pillows and sleeps on his back and adores these.