We did the full transit in Jan, 2006 on Celebrity's Summit. Was a really
wonderful trip - can't say enough about the ship, service and overall
atmosphere of the cruise. Was quite an experience - weather was great -
warm enough for shorts but not really hot or humid. Actually the day we
did the canal was rather cloudy which was good as I understand the
canal can be extremely warm and humid. If you have your heart set on
doing a lot of shopping at the different ports - not as much to pick from
like the Caribbean but that was ok with dear husband. Hope you enjoy
and definately book a balcony if you can.