Didn't take an excursion as we docked in the town centre. Very busy market and packed town centre. Difficult to get out anywhere and see anything of the place - disappointed as only excursions were to beaches, which we didn't want to do. Advise you to research the port before you go and work out what you want to do beforehand as otherwise you will waste the day as we did trying to find something interesting to do.
We took an excursion from the quayside for 25 Euros - this covered all of the main attractions and we still had time for shopping at the end. A shuttle bus runs from the town to the port every 5 mins and is 1.50 Euros.