Martina's place is great, location is perfect and centrally located, place was clean and bright, perfect for a group of three or four. We were pleasantly shocked at how big the flat is! AC in the bedrooms is a huge plus too.
We were only there two nights, but this place would be great for a longer stay - full kitchen with dishwasher. There is a washing machine for clothes and lines outside the bedroom windows on which you can hang washed clothes to dry.
Martina herself is a great person who cares about ensuring you have a great trip - she gave us detailed directions, recommendations, and wrote notes all over the city map ( which she provided). We always prefer to "eat like a local" so this was perfect. We completely enjoyed our stay!