Caution to anyone booking this excursion from La Spezia. We took it last week and had two major issues.
First - the Celebrity vendor did not follow the itinerary. As booked, we would be bussed to Levanto, take a train to Monterosso, bus to Manarola and bus to Riomagiorre. Our guide reversed the order and ended the tour early in Monterosso. I talked to the guide about why and she said I was on the wrong tour! (I wasn't) This was a pricey excursion and we did not get what we paid for.
Second - bad weather was handled terribly. We experienced torrential, sideways-blowing rain the morning of our excursion. Forecast was too late to cancel and Celebrity wouldn't. We understand nobody controls the weather and we don't mind getting wet. However, if we had been on the correct tour, we would have been covered and dry for the first 2 hours of the tour during the worst of the rain. I assumed adjustments would be made so we could stay a little drier, but we were booted off the bus into the blowing rain. Our guide was also quite aggressive with us about "being happy" and threatened to send us back to the boat via the train if we weren't happy. Appalling.
I sent an online comment card while on the ship and got no response. Book this tour at great risk. I recommend a private small group tour (ItalyTours has one from La Spezia) where they will adjust for comfort and stick to the itinerary. How Celebrity handled this is the biggest disappointment of my cruise.