It worked out well since it's cheaper to go via Viator. Went early May debt crisis and strike actions luckily didn't affect us, so our group was small- 20 people. Majority were older people, but we all got along well, which is important since tables are shared for meals. Our Greek guide was very knowledgeable, having a degree in archaeology. At sites, it's great that she waits for the group to gather before giving the history. We were free to wander off on our own, as long as we met at designated points on time. Even when we're late someone usually is, they didn't make you feel bad about it. We liked the moderate pace of the tour. Except for the 1st day which was a little more packed, with a late afternoon lunch, days started with breakfast buffets, followed by visits to a major sitemuseum, a lunch stop at their chosen place, where we had to pay for ourselves price is not unreasonable though and a long drive to the next destination, always with a toiletsnack stop to break it up. Dinner buffets at hotel usually by 8 pm. Amalia hotels are pretty good, always spacious and have fresh scented linen and towels. Their condition gets better at each stop, with Olympia's one the oldest and least comfortable. We found the buffets generous and tasty, but some grew tedious of the food because it wasn't Greek food. There was no pressure to give gratuities- it wasn't mentioned at all- but several gave it to the guide and bus driver in envelopes, along with the tour customer survey, which we were reminded to do. Recommended! Learn so much more on a tour. We wished we were going on the 7 day tour at the end.