I traveled to Greece with my parents, husband, and mother-in-law. This was scheduled for the last day prior to leaving back home and this was one of the best tours while in Greece!
Giannis (which I hope is the right spelling) picked us up at our hotel in Athens and the long drive to Mycanae, Nafplio and Corinth. The van was well appointed with rain poncho, wet wipes, snacks, maps for each person in the van. Giannis is a great conversationalist, intelligent, with a ton of information about Greece in general.
At two of the stops, Epidaurus and Mycenae we had a guide dedicated for these two locations.
My favorite (not only seeing the historic sites), but our lunch in Nafplio a gorgeous city and delicious seafood! My mother-in-law even tried octopus for the very first time and loved the taste and texture (which can be difficult with octopus!).
The total time of the tour is about 9 hours. The sites can be difficult to navigate (meaning uphills and a ton of steps). The parents all opted out of some part of the tours because of the navigation of steps and uphill.
Overall, I highly recommend this tour - all of us really enjoyed the sites and Giannis made this truly a highlighted tour of Greece!