I will definitely raccomend Alex's house!
It's so close to all the touristic things (opera house, harbour, museums,..). I've walked basically everywhere from Alex's house.
It's also close to the train station and there are a few bus stops close by to go to other neighborhoods or the beach!
Alex is such a good host: he makes sure you feel welcomed at home, keeps the house clean and neat, responds fast and effectively to any message, he even replaced the shower head that I broke by accident and didn't ask for money back. That was so nice of him!
Highly recommend!!