Greece Travel Review: Athens, Santorini, Catamaran Tour, 8-Night Trip

I had a great overall experience with our travel agency. They did a great job staying close to our budget (they did go over by a couple hundred dollars, but they also explained how to bring that cost below budget; we ultimately decided the extra money was worth what we were getting). All the tours we received were either private or semi-private. In retrospect, I would've asked for semi-private tours instead to save a bit of money (although it's hard to know exactly how much we would have saved).
We visited Athens and Santorini, and flew back to Athens for the night before our early flight back to California. It was a great relief to not plan any of the transit within Greece; all that was excellently handled by the travel agency, including flights and transfers to the airport (we had already booked our flights to and from Greece before contacting the travel agency so I can't speak to that). 
And a special shoutout to Eleni; we were late for a pickup for a catamaran tour and she was able to rebook us at a later date with no extra charge!