Topper arrived sooner than expected.  Unpacking was easy.  It’s amazing how they can fit all that into such a small box!  I let it lay flat for the recommended 48 hours but didn’t take that long for it to take shape.  The “new” odor dissipated during that time too.  We’ve only slept on it for 3 nights but are pleased so far.  We put it on top of an aging Sleep Number so still have the ability to adjust the firmness of the bottom mattress.  The 3” foam provides the cushion & comfort we were looking for. The only negative is that it isn’t as “cooling” as I had hoped.  I put a mattress pad on the topper but it still retains/generates heat.  We’ll give it more time though because it is comfy & has reduced pressure point issues created by our old mattress.