I had responded to the other one in CC.
I have 2 kings, one queen, one full and two twins in Saatva mattresses.
I picked Saatva because they use organic materials, wool that is humanely harvested, and are made in the USA.
They are extremely comfortable, my family and guests love them.
They have free delivery, but I believe they did change it to costing $100 if you want to return, (understandable), and you get your full paid price back and they donate your return to veteran's homes. Plus they offer veterans discounts and usually have a sale going on.
Worth every penny. I would never consider another brand at this point.