My doc was recommending a new bed for my bad back. I've looked at so many and was appalled at the cost of some, especially the Sleep Number beds and temperpedic. PT & Dr. recommendations were especially strong and positive for memory foam-type matresses. BUT! those that were so firm were painful for other arthritic areas. This sounded like a good quality fair priced option, so I bought it. It is too firm for me, but if someone wants a really firm bed that molds down around you just a little bit, it is a really good mattress. No odor problem and the neatest thing to watch it unfold and puff itself up from the water-heater sized box it came in all rolled up. It will be fine for the guest bedroom. Except for it being too firm for my comfort, it was a good buy.