This is my second adjustable bed.  The zero gravity position on my first bed was excellent. Within minutes I fell asleep. Since they no longer sell that adjustable, and after several months looking, I choose this adjustable. I can’t seem to find the same sweet spot position and it ends up hurting my back and neck, and I end up with the mattress flat again, just so I can sleep.  After months of trying, I simply use this adjustable as a very expensive box spring. Oh, yeah the under bed light is pretty cool!