We purchased this from Paul Simon Milton Keynes and soon became aware that "dips" were developing in the mattress where we lay. We were told this was "settlement" and was to be expected. No other bed we have owned has ever done this. It was agreed that this was faulty and would be replaced. It took 8 weeks to replace and the new bed is developing dips as well. Sealy claim this is settlement and will not send anyone out to investigate for at least 6/8 weeks even though the previous bed with the same problem was agreed to be faulty. Due to the uneven surface of the mattress it does not provide the correct support and we are suffering sleepless nights as a direct result. It has proved to be impossible to obtain a refund from Paul Simon. Sealy have stated that the lack of comfort is not an problem as everyone's idea of comfort is different??? We have a bed with 2 grooves down it and extremely poor or non-existant customer service from Paul simon and Sealy.