This was a great location; even better than I had realized when I booked it. It was about a 15 minute walk from the ferry, and Mary met us there - she was great about the fact that the ferry was close to an hour and a half late (high winds), which we communicated to her as things progressed.
Just a block off 25th August Street, where all the restaurants and shops can be found. A few blocks down to the harbour and the Fortress, or a few blocks up to where you'll find many more shops and restaurants, the Loggia, and much more. 10-15 minute walk to the Archaeological Museum and Eleftherias Square where you can get the bus to Knossos , which is about a ~20 minute bus ride and costs 2.5 Euro, which you can pay on the bus.
The apartment was clean and had everything we needed. Beautiful view from the giant, private sundeck. 4th floor, but there is an elevator.
Only small hiccup we had was that the fridge stopped working, which certainly wasn't under Mary's control, and she was getting it fixed after we left (we only stayed 2 nights) - I only mention it in case you're staying soon after; you might want to make sure it was fixed if you'll need it.
Had a great stay; thanks for everything, Mary!