Viktorias place is great and so is Viktoria.

The place is centrally located so it is no more than a 15 minute drive most places (Beaches on the south side of the island, Beaches on the North side of the island, Pollinia, Plaka, Klima) The main town Adamas (where the port is) is a short walk which is great if you want to go grab drinks at night and walk home.
Her place is also filled with amenities. We were able to find everything we needed which is kind of amazing considering the size of the room. Viktoria even left toast, butter and jam in the fridge for us for little morning snacks. She will also do your laundry for you for 5 euro which was great for us because we didn't pack a lot of clothes. You will have to air dry your clothes on the drying rack on the porch but that wasn't a problem for us.
Viktoria is super responsive to messages. She was also very helpful with getting around the island. She even helped us get a rental car delivered to her place so we didn't need to walk back to the port to rent one.
Overall, I would definitely recommend staying at Christina House. It is a great value and made for a great experience in Milos.