We didn't book the excursion with MSC but used their shuttle bus (6,5) to get into town, everything is within walking distance.
Very nice place to visit. Again we only used the shuttle service of MSC (20) and we visited the archeological site by ourselves, a must do, a really nice place to visit.
Nice place to visit, we took a Taxi to Ephese (100 both way) and visited the archeological site.
We visited Istanbul before so we only took a walk into town.