I got a koala then got a topper for it cos my hips still hurt. I should've bought the better mattress with the built in topper. I got the 2nd cheapest of the four koala options. FWIW I am now happy with it. I bought new sheets too, I've got a voucher for $40 off canningvale I'm not planning to use if you want it. I got their sereno linen/cotton blend.