This time we are disappointed. Unfortunately, this mattress appears to be defective... We left it sitting flat for a full 5 days without use, but there is a dip in the center area near the foot of the bed, and also when laying on it now we sink far more than anticipated.  The mattress was shown to be medium but in fact what was received showed 2 on a scale of 1-5 with 1 being Plush and 5 being Firm...  the mattress is just too soft and therefore not comfortable to us and we are concerned also about the dip in the middle portion toward the foot of the bed that still will not fully fluff up.  Also, there is not really enough edge support but likely that is because the mattress overall is just too soft.  Since too soft and apparently defective (dip), it appears we will have to return this one and try again.