Ελένη is a very attentive host. Even though there is self check-in she still waited up to make sure we made it in ok with our late ferry. She is easy to get in contact with as well since she lives in the unit below.
The location of the apartment is great if you are doing a boat tour (which I highly recommend). You can walk right to the pier in minutes so it's very convenient for the early morning start times. It's also right next to the bus stop, so it's highly convenient for getting around the island.
The AC works great and there was plenty of hot water. The bathroom is kind of small so you will likely end up getting the whole floor wet when you shower. There is a floor drain so it's not a problem, but we did end up brushing our teeth at the kitchen sink instead to avoid the damp floor at night.
The outdoor patio is great for eating and drinking at the end of the day. The neighborhood is also very peaceful at night despite being close to everything. We had no issues with noise and slept easily.
Overall, we had a good stay and explored a lot of Milos easily with the convenient location.