Not really enough time on the ground to see or enjoy Santorini. - Nothing wrong with the tour operator, but 4 hours in Santorini on the ground is not enough to do much especially since you have to eat lunch there and service is not always fast.

Could be bette! - No connection with Viator whatsoever. The worst part was at the end- we did not have the number of the bus to take us back to our hotel in Chania. Other groups had numbers of the busses on cards, given by the driver in the morning. It was already dark, the busses were leaving and we were stressed running from driver to driver to find ours. I think for the money we spent we had to get better care!

Disappointing - This trip was a waste of time and very disappointing. Santorini is overrated and very very crowded. There was no time to explore anything. Most of this trip consisted of traveling in the bus and on the ferry. We spent 1.5 hours in Oia which is nowhere near enough to get the feel of it. Half an hour in Thera was laughable. We paid for the optional trip to the volcano which was short and not worth it. Visit Chania instead.