Opens and "comes to size" almost immediately. We let it sit for 24 hours a recommended. I did not notice much odor with this mattress. The last one I purchased was during summer and the odor was slightly noticeable. This is our second purchase of this brand. Same mattress different thickness. This 8" mattress was purchased for the bottom bunk of a full over full bunk bed. Its absolutely perfect for the kids. Honestly, I didn't notice much difference in the firmness or comfort of the two. I prefer the 14" Eurobox for myself. However, this mattress has been great for our kids. I do recommend this brand. My last mattress was Queen. After two years it shows no signs of wear. I felt as though it had the quality of Sealy mattresses from the 70s without the ability to flip it.

After 2 years without a proper bed my wife and I had enough. So we purchased this mattress. First couple of days was rough but once we got used to it, boy do we love this mattress. It’s so comfortable, especially after a hard day at work which ironically we both work at Sam’s Club.

We got this for a family member who has severe back pain. He uses a 4 inch mattress topper that is soft due to this mattress is very firm. No saging or indentions where he lays. 250 lbs and 5'11. His back has been very supported and he has had wonderful sleep. We used a metal box spring with this. Delivered right to his apt. No problems with anything. Very pleased with the price point and the quality.

I am very happy with this mattress. I went from a Serta pillow top to the Zinus and have been sleeping on it for a few weeks now. I am sleeping very good on it, am very satisfied.

Amazing to watch this mattress as we unboxed it! It is very comfortable and we did not have any issues with “soft” corners - a concern others expressed.

The mattress is of good quality and far better that the costly mattresses. Ordering and the shipping process was easy. I am very impressed and would definitely buy another one .

I purchased this mattress for my 10-year-old daughter. It is very comfortable, and she is pleased with it. Though I haven't slept a full night on it, the times I have sat with her in her bed, it seemed like it would be comfortable for an adult as well.

This was easy to assemble only toke me and my daughter about 10 mins. To put together..comfortable yes..wow very nice product. Love it..

When I saw how this I arrived, I thought for sure I’d been had! But much to my surprise, this mattress is extremely comfortable. It does not, however, fit a standard full size bed frame. It is not as wide. We have about an inch overhang of the bedframe on each side, which the covers easily camouflage. A good value for the money however.

This bed is a bit on the firm side. It doesn't feel like it would hold up well to every night sleeping. I'm glad it is the guest room bed and not the master bedroom!