This bed was so tempting to lay down on immediately. However, we restrained ourselves and waiting the first 24 hours just in case. It was incredibly easy to set up; it only took minutes. My partner sleeps very hot, and there hasn't been a single night of "ugh, it's too hot" ever since! The sheets we have don't really fit perfectly, so I may invest in the ghostbed sheets. I can recommend if you want the cooling feeling, don't use a mattress cover. The mattress didn't have a single night of "break in" for us, it was super comfortable from the get-go. The temperature never fails at staying nice and cold. I can feel the balance through the mattress.