let me start by saying that Teresa really is a wonderful host. She was always available day or night and helped in any at she could. A true super host.
In terms of location, it's perfect since its quiet at night and not far from the bustling night life. We loved it as a base for walking all over the city and felt so pleased to leave the crowded streets and return to our quiet flat only minutes from the bustling tourists. And that's the other thing, in the old town you can really see how the locals live and don't have have to always be surrounded by tourists.
One of the most important things is that you have privacy from windows looking in on the apartment living room and bedroom, looking out to the sea. This is rare in the old town!
Of course, being the old town, some things are not as new as they might be in the new town, like no elevators, a slight smell of damp in the front lobby and no washing machine in the apartment (although there is a washing service outside), but honestly, this is part of the charm of staying in such historic surroundings. Also Teresa's actual apartment is super clean, very safe and has everything that you need to enjoy your stay. We would definitely stay at Teresa's flat again and recommend it highly.