We had a wonderful time exploring Tinos and using the Villa at Agios Sostis as our base. The Villa has all the amenities we needed, and our family of 6 fitted fine - with the exception of not a huge amount of storage space to unpack suitcases in.
The nearby beach was lovely, even in mid-May, and we had plenty of swims.
It's worth noting that there are lots of cats that hang around, and one evening one stole a fish we were barbecuing, so watch your food! The upstairs balcony has great views of the sea and we loved having breakfast up there.
We would happily stay at Sofia's place again!