Purchase this mattress on 11/13/2008 and now have an impression that makes you feel like you have to roll up a hill when trying to turn over. They informed me that the test showed the mattress to be within spec. This is the test, they stretch a string across the bed from the left to right side and measure the distance from the mattress to the string. This is done in three places, next the inspector press down on the mattress to represent a person laying in bed. This is a false test because the inspector cannot get the same results as a 215 lb... read full review »