We had a wonderful stay at Irine's place. It is a beautifully renovated and tastefully decorated traditional two-floor home located at Ano Syros, the old town of Syros on the hill up from Hermoupolis, with a majestic view of the town.
The home was fully equipped, very comfortable, spacious, with a kitchen with many appliances, lots of surfaces and storage space, and air-conditioning on the main room for the hot summer days. Irine and Lena, the house manager, were welcoming, easy to communicate with and very responsive to our wishes (for example we asked for a shaker and found one waiting for us at our entrance the very next morning).
Ano Syros, the "catholic" hill, offers tavernas, cafes, a mini market and the pleasure to get lost in its winding alleys, while it is a delightful 15-20 minute walk down to Hermoupolis center or to Vaporia for a swim. To go up is more a of a challenge, but thankfully there are many taxis and mini-buses.
Highly recommended!