This accommodation is part of a larger villa, which consists of another AirBnB apartment (both on the first floor) and a ground floor apartment where Nikos and his family live. The place is large, modern, and clean. The pool is fantastic, and there is a lot space by the pool for sunbathing, with sun beds, umbrellas etc. The views from the apartment are impressive, and there are two balconies from which to enjoy them. The host's mum was very friendly and welcoming, and helped us find the place.
Megas Gialos has two beaches, which a fine but quite narrow and near the road. The beach at Galissas, however, is fantastic, and only 10 minutes by car away. Megas Gialos is small doesn't have much in the way of infrastructure, but a taverna and a small shop are within walking distance. Finikas is a larger village with more shops and restaurants, less than 10 minutes by car.
The only downside was that the apartment is up a steep hill, which proved too much for our small rental car (a Fiat Panda). We were able to park at the foot of the hill though, and then it's a 5 minute walk to the property.
Overall, we enjoyed staying at Nikos' place and loved exploring Syros.