I feel very well supported without the feeling of sleeping on a hard surface. Much better circulation and much less stiffness when waking up in the morning.
My sleep improves with every night. I am comfortably suspended on the mattress, it doesn't sink and motion doesn't transfer so I am not awakened by my dog when he moves around.
The comfort level is amazing. My sleep has been great. It feels soft and firm all at once. I am a side sleeper and it has made a huge difference for my hips. I have talked a coworker into buying one and my dad and stepmom. Plus I am buying one for my daughter!