Hi PackerBackerCH,
There will be a break in and adjustment period for any new mattress or sleeping system as the mattress loses some of its “false firmness” and the cover stretches and loosens a little (see post #3 here). This would typically be a few weeks but it can be shorter or longer depending on the specifics of the person and the mattress. You can sleep in different areas of the mattress, or be a little more frequent with mattress rotations to help to expedite this “settling-in” process.
Phoenix