We went on the same cruise in July so hopefully the following will be of assistance. Please be aware that the ship may not tie up at the same dock but hopefully it will. Livorno - we docked next to the ferry terminal close to the town and not at the container port where larger ships have to go. If you tie up here then you can stroll into the town on the flat in about 10 minutes. The No 1 bus can take you to the rail station or in the other direction I believe it goes to the beach. Genoa - although it ties up at the main cruise terminal it's a bit awkward to get out and down to the city as you are directed up and down some lengthy stairs (there may be lifts somewhere). Alternatively a short taxi ride will get you into the city centre which is well worth visiting - but get a decent map as the side streets are very confusing and you have to walk in these. Marseilles - the ship docks some way out from the city centre but there is a shuttle bus (which you have to pay for) which drops you off right by the harbour. From here you can get the open topped bus or the mini train to take you around the sights - both good options if walking difficult. Also the side streets around the sea front are quite interesting with some nice shops and cafes. Note - although you pay for the shuttle bus you can use it as many times as you like throughout the day at no extra charge - you buy the tickets in advance on the ship - check info in your cabin or ask at tour desk. . Barcelona - the ship docked right next to the centre station for the cable car and fairly close to the Columbus statue and the end of the Ramblas (most ships are docked further out and need a bus to get in). The red open topped bus also stops right by the terminal which would also be excellent for you. Note there is more than one route so I recommend you research the routes before you go - they all seemed to converge here which is handy and you will have time to go on more than one route. Valencia - the docks are some way from the centre but there is a shuttle bus which takes you out of the docks area - after that you have to get a local bus into the city centre - Island Cruises will advise the bus No to get. Hope this helps.
Hi our experience has been that there is a shuttle bus from the ship into town, in Livorno the shuttle bus drops you off right beside a tourist information booth, which we found very helpful. Also in this square you will find local taxi drivers offering trips to Florence & Pisa, - they put a group together and I spoke to one man who joined a group of 6 and they got this trip for approx £30 each after some haggling. There is also a tourist bus which takes you around Livorno which leaves from the same square, it costs 5 euro and lasts about 1 hour 20 mins. In Barcelona the Hop on Hop off bus stop is very close to where the shuttle bus drops you off and costs about 25 Euro. I do not have experience in the other ports but we are doing this trip on the 23rd September on the Island Escape and will write a review when we get back. We really enjoyed the Island Star last year the staff are helpful and friendly and the entertainment was very good. Enjoy.