we did our homework and selected this mattress for the quality, features and price compared to others on the market.  It is good value for the price.  so many others were far more expensive with the same or less features and warranty.  I would have given a 5 star rating except for the layer under the top cover was skewed and did not realign after the mattress expanded and settled.  It is a minor item and does not affect the functionality of the mattress or the comfort.  We like the level of comfort and support provided by the mattress.