The description of this Item was "Zinus Night Therapy 12" Green Tea Zest w/Smartbase Set, Size: King" However, no Smartbase was received and thus this item was not a "Set". That was a disappointment. However, the actual Zinus mattress has proven to be a complete delight and surprise. It came packaged, as all memory foam mattresses, tightly compressed and rolled inside a large box. It was left in the box for about 5 days before being unrolled and although the packaging indicated that it would take 24-48 hours to reach its full thickness, it probably reached 11 1/2" within a few hours. Now, after a few weeks, it has reached its full 12" height on all areas of the mattress except a slight dip in two corners that isn't really a concern. The mattress is surprisingly firm and I love it for that reason. Some people who prefer a softer sleep surface may find the mattress too firm. This mattress replaces a pillow-top mattress that, after only about 3 years was dipping on each side. I'm hopeful this Zinus mattress holds its firmness and shape over time!

Finally able to get rid of our old Pillow top and so glad we could- this mattress is firm so we don’t sink in but also comfortable enough that I don’t feel pain especially at my hips and shoulders. It is a great quality that looks like it will hold up well especially as my husband and I are toss and turners. Also love the green tea infusion upon opening like other times we opened memory foam mattresses - we did not feel assaulted by smell after opening to air out - it was very pleasant and not strong at all. Would buy this mattress for our other rooms hands down

This Zinus 12 inch mattress topper is a great very comfortable, soft but firm at the same time. We put it in our den for extra bed for our guess specially last Thanksgiving week and this coming holiday season.I can’t believe that this just a topper. It could really be a real mattress. Same me money to tell you the truth. Highly recommend product

I was very anxious/nervous to try this bed. I have never had a full memory foam mattress(bed in a box). We ordered King size, which we've never had before(best idea ever), as we always have littles sleeping with us. Assembly of the smart base was quite easy. The directions were straightforward. The opening of the mattress was a bit chaotic, but I think that also has to do with the size and me being tiny trying to do it alone. I did not notice a scent from the mattress, which they said may be a problem for people. Once opened, the matress fluffed up with no issues. It fits completely on the smart base. The smartbase gives about a foot high of storage space beneath it, my kids have been using it as their hideout/tunnel. We love the amount of space we have. The memory foam does cradle you quite nicely. I prefer a firmer bed and my husband prefers softer. This mattress is satisfactory for both of our needs. We haven't noticed the "cooling effect" as much. I do believe that is because our previous bed had a cooling layer, so this mattress it isn't as prominent. For the price and what you actually recieve, this is a great set. Which I do believe will hold up quite well. Excited to continue using this bed set.

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

This bed is very firm, unfortunately it doesn’t give the firmness in any of the descriptions. We don’t mind a firm bed but this was much firmer than we could handle. We ended up having to add a mattress topper to be able to sleep on it. To be fair, this bed is great - a great price for what it is - and maybe it would be softer after extended use or in a different climate (we live in cold Wyoming). We did appreciate that it does not sleep hot and that you do not disturb your partner with movement. If it was softer, I would rate it 5 stars.

Surprisingly comfortable! We have name brand T. Beds for our kids but I could easily sub it out with this and they’d be great! I like a very firm bed so this wouldn’t work for Hubby & I. But it would definitely work for all our kids and the guest bedroom! Not sure the longevity yet but off the bat it’s comfortable & when you lay down it’s firm for a sec then you sink in a tad. Helps my kids stay in place a bit more when sleeping lol than rolling absolutely everywhere.

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.

This arrived in smaller packaging than I was expecting but expanded to full once opened. I wasn't sure how I would like the memory foam after using a pillow top for a few years but I was amazed at how well I slept. I use a water pillow which causes indents on my pillow top but I didn't have any of that on this mattress. Very comfortable and sturdy.

This is my first experience with a memory foam mattress and not sure I will be able to go back to a traditional spring mattress at this time. It comes in a box, which I didn't expect for starters and essentially vacuum sealed, which was great as it was delivered on the uncovered section of my porch on a rainy day, but the mattress stayed dry. It will definitely take more than one person to move around and the box indicates that. The mattress will take time to flatten out after you open it, but laying on it one night will take care of that. The first night it felt too firm for my liking, but it was new mattress experience for me. After the first night though, I am all in, it is firm, but not too firm and it doesn't make the same noise as a traditional mattress, which is nice because I am known to switch sides a lot. However, I have found myself not tossing and turning as much as normal either. This is a great mattress that I would recommend and at a very reasonable price to match.