Packaged well. Smell dissipated within an hour of unwrapping. Took its shape fairly quickly expanding to about five inches. Able to sleep on a few hours later. Slept okay but y morning was extremely warm so do not think there is any cooling effect. After about a week of use now, I'm finding the mattress topper softer then I would prefer and not firm enough.  Do not know it it will hold up.  Have back and hip issues, overweight, and ordered to reduce pressure points and for support..  Don't think it is supporting as well as an air mattress which I was hoping it would replace.  We will see.