I hesitated to buy it, it is expensive. but I must say that in short it is worth for people who have bone or muscle problems, I suffer lupus ostearticular and since I have it in short I have had a very good improvement, I can be more in bed resting, it is firm for the spine but smooth with the contours, now I want to buy a pillow of the same brand, my mattress is firm orthopedic too, is already 3 years old and this “top” came to renew it. I had no problem with shipping, it comes in roll and immediately takes its shape although it says to wait a couple of hours, it is not hot at night or cold, 5 stars definitive.