A fabulous place to stay. Valentini is the most amazing host: utterly lovely, and nothing was too much trouble (picked us up from the bus station, made me a birthday cake, gave us great tips on places to eat).
The apartment is excellent. Unbeatable location, right on the beach - literally walk down in your togs for a dip and then stroll back to the apartment. Fabulous view of the bay and Andros' trademark lighthouse. Easy walk into town (although there are quite a lot of steps).
Chora is lovely; not really aimed at foreign tourists, just Greek holiday makers - the Greek equivalent of Dorset (although obviously everyone speaks pretty perfect English). Also a great location for hiking - the trails are very well marked (although again, lots of steps).
It is worth highlighting that - as stated in the description - the terrace is shared. Not a problem for us, since the other apartment was only occupied for a couple of nights and the other guests were very considerate (even offered to share their breakfast crepes with us), but it does change the feel from a very private space into more of a shared space. On the other hand, the two apartments together would be ideal for two couples/families who didn't want to live in each other's pockets for the whole holiday.
Overall, very highly recommended - a fabulous relaxing space with everything you need within easy distance. And the most amazing Airbnb host we've every had.