Super comfortable. It seems the more you sleep on it the more comfortable it is. We put our 11 month old on the bed and he instantly fell asleep so he must think it is comfortable as well. We have the king size and it's so perfect for our family. Only thing is that I bought sheets in king size from the store and they are a little to big so it must be the depth of the mattress. Would definitely recommend getting this mattress.
We got our ghostbed about a month ago and I have never slept so well! I have a multitude of back issues and I wake up feeling amazing and fall asleep so quickly!