Purchased for a guest bedroom at my mother-in-law's. It comes compressed and requires up to 72 hours to expand. We didn't have time to wait and slept on it after only a few hours for 4 nights. Every night it felt like we were going to fall off the edges of the bed. The middle expanded but the edges dropped off. My husband remarked that if he laid on his back with his feet straight out his heels did not touch the mattress but were suspended in the air. Overall, it was a comfortable mattress just hope it fully expands before our next visit, so we don't feel like we are going to fall off.