My husband and I spent a week at Manos's apartment and overall we really enjoyed it. Among its best features were the very comfortable large bed - maybe the best we've ever found in an Airbnb - and the large, shaded balcony. The rooms were bright and spacious, and it was well supplied with all essentials.
The location was fairly good. It was a bit of a walk to get to both the Old Town and the New Town (and always uphill coming back to the apartment) and without sidewalks and having to dodge cars and overgrown shrubbery, it could be hard work, so returning to the apartment after dinner we always took taxis.
Communication with the hosts was okay - when we had a problem or question they responded quickly - but they left no written instructions or advice about the apartment or neighborhood and the tour we received when we checked in was very fast and not useful. (For example, we were told where the washing machine was - it was in the kitchen so we weren't likely to miss it - but not what its dials in Greek meant, or where to find the detergent, drying rack, etc.)
A few disadvantages: we had to be careful with the hot water to make it stretch to two showers, and there were lights and switches that didn't seem to work. Manos's brother said he would replace the bulb in the light over the bathroom mirror, but as that didn't happen, I assume the fixture was broken. The lock was also broken on the door-window in the living room, and when we asked about it we were advised to lower the outside shutter when we went out.
Our overall impression after our week's stay was that it was a very nice apartment, but if the hosts devoted a bit more time and attention to maintaining it and to communication with guests, it could be a great apartment.