I recently purchased a firm hybrid king mattress and found it to be too firm as I was having issues with my hips and shoulders.  I purchased this 3” gel topper hoping to resolve the issues.  The topper arrived quickly, was easy to unbox and set up and had minimal odor that dissipated within a day.  It’s well made and comfortable….I just find it to be too “marshmallowy”.  I think I should have went with a 2” so that I’d still have the firmness but relieve the pressure points - but I’ll be keeping this for now because my shoulders and hips are so much better - hopefully I’ll adjust to the mushiness.