The question is, how long does it take to get used to a new mattress? It's probably like a new pair of boots, a new pair of shoes. They hurt like the dickens the first couple days, but gradually they come around. Some people love their new mattress the first time they climb in it.
Others, it takes 30 to 45 days, but you got to stay with it. It's like an exercise program. You got to stay with it.
After 30 to 45 days, you and that mattress get to know each other. It conforms to your body shape. You'll start sleeping great every night.
So my answer to that would be 30 to 45 days, to get used to that new mattress. You'll sleep like a baby in 30 to 45 days. It may be a little rough along the way.
There may be a few hiccups, but hang in there. Great sleep is on the way.