I really have to say I truly love the smartbase that came with this mattress it is so lightweight that I by myself was able to unpack it, put it together and take it upstairs all by myself, and this was the king size! The smart bass has these clips that click when the legs lock out and in order to get them to go back down you have to press the button on it so you know it's locked when you're using it. I have had bases similar to this before that were so heavy, and even though the king comes in two pieces, I had to have help moving it. It also breaks down and stores super flat which is so nice if you have to move furniture to paint or you have to move. It does not take up a lot of room stored. I was surprised at how small the box was that it came in when I put it together. The height of the base is 14 inches. The green tea mattress I have to say did not have a lot of offgassing like some of the other mattresses that are similar that I have purchased before from other brands. It comes with directions that tell you it needs to be opened as soon as you get it and let it rest for about 72 hours which I did, it did have a slight odor but that's to be expected for anything that's been wrapped in plastic and that is a memory foam mattress but it was definitely not bad. I could be in the room with it and be in the house without it bothering me. The smell that it did have disputed so fast I was actually really impressed with that. After getting everything set up and sleeping on it for about two weeks I noticed that my back did not hurt as much as it normally does. The mattress is probably more of a medium stiffness not overly soft and not as hard as a medium firm mattress like my previous one was. it does hug you a little bit when you are sleeping so you don't feel a lot of movement from anybody else it's in the bed. The one thing though I did notice that after having it set up for a long time and sleeping on it is that the 12 inch mattress actually measures out to be more of around 11 inches good thing to know for purchasing sheets so you do have a little bit more options in sheets than a normal 12 inch mattress.

Great mattress. I got this for my 10 year old and he loved it. Much cheaper than many of the more expensive memory foam mattresses, but feels just as good. I have slept in it a night or two and I like it almost as much as my many times more expensive brand name memory foam mattress

The mattress was dumped , in the box, on my porch unannounced. The mattress had to be pried open, did not unroll and instantly expand. After a week plus it has expanded to 8-10 inches thick, not 12 and the corners are still deformed. I emailed Zinus who promptly referred me to Sam's Club online who quickly refunded my purchase. I upgraded to a Zinus 14 inch mattress, still waiting for it to be delivered.

The mattress rises to about 10 inches in the middle, but the corners stay partly compressed with obvious separation between the foam layers. It looks nothing like the square cornered, tall mattress in the picture. This is after over a week, not just initially. Having smaller, sloping corners is a detriment to its appearance and usability. The middle is comfortable to sleep on. Just wish it was as represented.

We bought this mattress for our 14 year old daughter a few weeks ago. She is loving it and hates getting out of bed in the morning because she is so comfortable. I have laid on it a couple times and it is pretty amazing, but can't speak to a several hour long night sleep. It decompressed perfectly and quickly. I would definitely buy another one.

This mattress is very comfortable. It is firm but the top layer is soft, so very comfortable. I have it in the guest room where it won't be used every night so I can't speak to how long it will last. For the price, I am very happy. It arrived quickly.

Had we not read the reviews prior to purchasing a mattress, we would have never chosen this one. It comes vacuum packed. Be sure you have it setting where you want it before removing the vacuum pack. It becomes its true size within seconds. Ours was ready to sleep on within the hour. We also ordered the 4" box spring that requires some assembly to go with it. Perfect height for a young child! There was no odor at all?? We love it!

bought this for 15 year old son along with a platform steel bed from sam's. Mattress came rolled up in a rectangular box which freaked us out a bit because we had never seen this done before. Plus, when we opened the box and unrolled the mattress, it was about 3 inches high. A note included said to let it rest 24-48 hours to allow it to grow to full size...It did just that. :) My son says the mattress is very comfortable.

I am not a mover and shaker during the night. I typically rotate from one side to the next never on my back nor on my stomach. This mattress cradles my sides and allows my body to melt into the mattress. This supports both my hips and my shoulders. For those with a very subtle body movement at night, this is a perfect mattress.

I purchased this mattress as a gift for my youngest daughter and her husband. They allowed it pluff up for 72 hours. My daughter texted me the first night and said it hugged her the minute she laid down. They seem to be liking the matress fairly well although it took several nights for my daughter to get used to it. They have never slept on a memory foam mattress. She also said she was having trouble not getting to close to the edge as it slowly compresses and she's afraid she'll roll off in the night. Her husband who is a big man slept like a log starting the first night of use. One suggestion my daughter made was that handles be on the sides to make it easier to carry or turn.