We bought this mattress because of the wonderful reviews it got, but it hasn't been so wonderful for us! Our first mattress developed a sink hole on the sides after only a couple months use. We had to wait a month plus for a technician to come out and evaluate it, then we waited another couple months for another exact mattress to be delivered for an exchange. When we bought the original mattress, the sales specialist told us the mattress had a low motion transference feature.. not! I can feel the mattress moving when my husband makes even the slightest motion in bed! We are totally frustrated! We have not had a good nights sleep in months!