The good:
Nikos' place is located very close to St. Mark's Square and the Doge's Palace, which is convenient.
There are restaurants immediately nearby, with a variety of options.
It's very close to the water bus/taxi pickup point and easy to transfer on foot from the train station.
Nikos was also very helpful and accommodating.
The not-so-good:
For our family, who wasn't partaking in "late-night" activities, the restaurant/bar almost right below was extremely loud until 1:30 every night we were there - rain or shine - and they dragged tables out and opened shutters starting the noise again at 7:10 each morning.
The back bedroom was enough space for our toddler, but faced the back alley where restaurants threw out bottles (roughly) every hour, which was also quite noisy.
Lastly, we would describe the towels as a little crispy/rough.
Overall, it would be great for couples who run at all hours and want a convenient location, but less ideal for families with young children.