We stay for 4 nigths in Marco's appartement. The appartement is really nice, spacious and very clean, feels like home. It has all the necessary utilities. You can easily reach the Oceanograf and the Science museum and it's only 25 min walking from the city center. We really had a great time and we enjoyed our stay. We communicated very well with Marcos.
The only thing we didn't like was the smell in the bathroom, but it wasn't too bad.