Based on the overwhelming positive ratings, we decided to purchase this topper for our Cal King bed. Order processing and home shipping was great. Upon opening the package, there was almost no odor noticeable. However, it could be seen that the item had been compressed so tightly that some parts of the mattress topper looked like they had been run over flat by a steam roller. We set the topper out on a spare bed and gave it a week to restore to its advertised size. Sadly, less than half expanded to 3", a few places along the edge got up to 3-5/8", but a good part of the sleepable area remained hard and just plain didn't expand. My guess is that the manufacturer compresses these toppers quite tightly, shipped to the USA on a slow boat from China, then eventually find a home. Memory foam just does not respond well to being tightly compressed and left in a box too long. If you happen to get 'fresh' stock you may have better luck (ideally 90 days or less in a compressed state). But if you get 'old' stock, the memory foam may have become damaged. I noticed that the Date of Delivery (to Walmart) was left blank on the box. So we'll be taking this back to Walmart, since it didn't live up to its advertised description. (See my attached pictures.)
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