Easily 5 stars. Let me first start off by saying I did more research on trying to find the perfect mattress than on a college essay. We received this mattress yesterday. We ordered a California king so it did take 4 of us to lift it onto our metal bed frame. It expanded to 12” within 24 hours. This mattress has excellent edge support, and it is firm and plush both at the same time. It also didn’t put off any bad odor as it expanded which I had read many reviews that these mattresses in a box sometimes do. My husband has had hip pain for years and woke up this morning feeling way less body aches so that’s a win in my book. We couldn’t be more happier with this mattress. Even though we’ve only slept on it one night. I will edit my review if we come across any issues. Please trust other 5 star reviews about this mattress. It’s a game changer for great sleep!