Not sure about this mattress
Delivery was prompt and it expanded accordingly without any problem
No off gas smell either. Customer support has been good so far. 
I liked the feel of the mattress not too soft or too firm but have been waking up with a stiff neck and lower back. I believe mattress may not support me well enough in the hip area. I’m 5’3 and approximately 165 pounds heavier through the hips and thighs but also heavy on top so not sure why as weight distribution is fairly even and not that disproportionate.
I’m considering sending it back as I have had it for over 30 days now and problem persists.
Really wanted to love it and probably a good mattress but doesn’t work for me. Also important to note I’m a combo sleeper but prefer sleeping on my stomach/side mostly.