Prior to this purchase, I had purchased an OVERSTOCK bulk pack of two 10" Queen sized mattresses for the guest rooms in our new weekend home. We also needed a bed for ourselves so we decided to try these before we purchased a King sized. We liked it! The MEMORY FOAM is very different from what we are used to (a number bed) - much harder but, still very comfortable. And it was not at all hot - a real concern for this 50+ woman. LOL. After the first weekend, we were hooked. I came back to OVERSTOCK to search for the King and found this SELECT-A-FIRMNESS. I ordered the MEDIUM and I have to say that it is worth the extra money - (about $70.00 if you are an Club O member.) There IS A NOTICEABLE difference in the firmness and both of us are glad I paid for the option. It was packed "tootsie roll style" - like the queens but, in a plastic sock instead of the canvas. It plumped up quickly- we slept on it the first night and, we didn't notice any smell at all, (and I know the smell others write about because I've ordered memory foam pads - they smelled for weeks - and were hot.) I recommend HIGHLY this mattress. (And my friend who purchased the name brand thinks that this one is just as comfortable as hers.) If you are at all concerned about the firmness, try the SOFT but, keep in mind that the closer the mattress molds to your body - the warmer the mattress will feel. Thank you OVERSTOCK. This mattress is a great value!