Allowed our mattresses to expand the full 48 hrs. Completely recommend this as they gained approximately 1/4” during the last 24 hrs.
Completely love our new mattresses, the base foam is supportive and the other layers do provide the support as advertised with some plushness on top. We do feel we are sleeping a bit cooler during temp changes in the room during the night and are completely satisfied with the comfort & support. 
*Note we are only one week in, but do hope the mattresses perform for many years to come!