This was my first cruise on a huge 'CruiseShip' and I had come to expect at least a great night's sleep based on a variety of source materials. It came as quite a surprise that the very used nearly 6" inch thick 'mattress' was also concave in both directions - top to bottom AND side to side. When I called the 'front desk' to find out if something could be done, I was informed that there were no ...