Was a bit worried buying a firm mattress however we absolutely love it. I hate memory foam and the feeling of sinking in, preferring to lie on top of my mattress. This does exactly that. Also great for sharing a bed as you don't roll in towards the weight of your partner. My partner also usually has a sore back and neck in the mornings which has immediately stopped. Really love it, great buy  recommend for those who like a supportive, non sinking mattress.