Owner Contentment for Big Brands Simmons More than half of reviews are positive for Simmons. A sizeable amount of negative reviews shows that there is room for improvement in the support of their mattresses. Contentment for Simmons 54% Happy "...seems to be one of the best and gives great support." "So far this bed feels better than anything I have ever slept on..." 39% Unhappy "It is just 4 months old and sags more than the 10 year old mattress it replaced." "...loved it until 2 years into it it was sagging almost an inch in the middle..." 7% Neutral "I don't mind the mattress, but I know there's a better mattress out there for me."