I have a Molecule 1 California King Mattress and it is unbelievable! It is so comfortable and cool! I am a hot sleeper and as I have been sleeping on my Molecule mattress, I rarely wake up at night. Most nights, I wake up and my bed is practically made since I barely moved during the night. It is amazing! I have slept in 5-star hotels for the last 10 years and this bed is better than any bed I have slept in. I love it and would definitely recommend it to anyone looking to invest in their night's sleep!