We had to get a bed in a box after our traditional spring mattress would not fit up the stairs, even after taking out the handrail. However, we were worried about the level of firmness and support we wouldn’t get from a foam bed. The Mint was super easy to get upstairs and it puffed up instantly on our King bed frame with no harsh chemical smell at all, and it is the perfect amount of firm and forgiving. We are very happy with our purchase!