I have an adjustable bed that used to have a Sealy Posturpedic pillow-top mattress that was soft enough to allow it to bend when the bed was in the head-up or feet-up positions. I would awaken in the morning with all sorts of aches from the mattress being too soft. I ordered the ECO 8-inch latex mattress from Overstock.com solely on the reviews. The customer service representative was great---researching and answering my questions about whether this mattress would work on an adjustable bed and what my options might be if I wanted to return it. This mattress is GREAT! Yes, it is firm, but not too firm for me. It gives good support, but is flexible enough to still alllow me to adjust the head or foot of the bed. The price was very good and it arrived in good condition in a timely manner. I did need a little help to get it unpacked and on the existing boxspring, but all of that went smoothly. Ahhh, sleeping well and no backache in the morning now. It has plenty of support and even makes sleeping on my stomach possible again.