I bought this for my guest bedroom and it's gone onto a sprung-slatted oak bed. We've had guests to stay now and they were very complimentary about it. One of them is considerably heavier than the other but both enjoyed a very good few nights' sleep. I've now tested it too and find it to be a perfect level of firmness. With a nice mattress protector and new bedding on it even feels quite luxurious. The only reason to drop a star is that there is still a slight 'biscuity' smell coming off the mattress, but I'm sure that'll go eventually; plus the edges give a little - not a lot (it's still perfectly comfortable to lie on right up to the edge), but a little bit. For the price, though, I think this is an excellent mattress.