The Host was very welcoming and always available during our stay, he gave us very good suggestion on thing to do, visit and where to eat well for our holidays.
The house was just finished to be restored and it is placed in one of the best places in Oia (therefore one of the best places on the island itself): it is on the main street of Oia, full of restaurants close by, and even more important just few steps from the best spots to admire the famous Santorini Sunset.
We are a family of 3 (our boy is 2 years old) and we have enough room, we never felt the house was too small, I think that even a group of 4 will enjoy without problem this house.
The jacuzzi is also a very nice feature of the house, the view from there is just amazing and pictures do not really tell the feeling when you are actually there.

About Oia, it is a very nice town, full of history, and if you are looking for very relaxing vacation this is the pace to be.
If you are looking to spend few days on the beaches as well make sure to rent a car or motorbike as there are different kind of places to visit and you need to drive 30-40 minutes from Oia to reach the more distant ones.