Although we enjoyed our cruise on Liberty. the service was not at par with some of the other cruise lines.  At times the deck near the pool was dirty with french fries and spilled on the floor.  Not only was it dangerous, but it was also unsightly.  We had some difficulties with seating arrangements in the diningroom.  The maitre'd was very slow to correct the problem, saying it was the fault of the booking agent.  At one point we tried to buy a stamp.  The person at the desk did not know where the stamps were.  When we returned as suggested they would not allow us to use our card.  As it was we did not have enough money to pay for the stamp so we elected to buy one in port.  The two persons on duty were arguing in front of us.  We were not introduced to our cabin steward and as a result he lost out on the extra tip for good service.  Entertainment was great.  Sailing away party was boring with not much to do.  The line ups to get on board ship were appalling.  Surely if other cruise lines can get you processed quickly and efficiently, Carnival can too.