When reading bed mattress reviews, it is important to understand that many reviews found on internet websites are negative, no matter what the product is. An unhappy consumer will naturally be more driven to take some action, if not to solve their own problem, then at least to help others avoid making the same mistake.
This is especially true for bed mattress reviews, which have such a wide range of possible ratings. Often the problem is not the mattress itself, but the wrong match between the brand or model and the individual sleeping on it. People vary so much, not just in size and weight, but in their perceptions and definitions of physical comfort.