We tried this in the shop, and tried the little test to give you ideas of what mattress you need. This didn't come up as one, but combination mattress did so we went for this! We only had it for a few days as it had a few rips in the base and corners, so we are waiting for a replacement. We did have the best sleep on it though in the week we had it! I love that it is really thick. You'll need extra deep fitted sheets. It's a little firmer than in the shop, but that's understandable. I did feel like it dipped after I spent a long time in bed (I work nights so I tend to lie in bed longer), but I sort of pushed it back into shape, like plumping the pillows. No back ache, no neck ache, just a well needed SOLID sleep that both me and my partner have needed for a long time after having a horrible springy mattress that digs in!