The stay was truly all right, the host himself always made sure that issues we shared were resolved.
The flat, however, was not clean and had a severe issue with mold to the point of it being visibly overpainted on the walls, the bathroom door having black mold all over and the flat smelling of mold everywhere, especially the kitchen. The kitchen appliances all showed signs of mold and while the host bought new ones, the core issue obviously wasn't rectified.
Furthermore the toilet should definitely be fixed to the floor as the toilet is quiet wobbly to the point of it leading to spillages on the floor. When we told the host this, he in turn told us to "not flush that hard and it should resolve itself", indicating that the issue was known before our stay.
For travelers after us it might also be interesting to know that the one bedroom apartment is located on the ground level and because of the directive to only shut the sturdy metal shutters and not the door itself, it lead to it feeling as if we were literally sitting on the (frankly really noisy) street instead of an apartment.
The most logical explanation for all the mold is the severe humidity trapped inside this apartment due to it not having any windows apart from the one directly above the entrance door (no window in the bathroom).
The location of the apartment was quiet nice as it was only about 20 to 40 minutes from the major sights such as the Archeological Museum or the Castles on the shore line. If one doesn't feel like cooking there is an excellent and inexpensive pizzeria two doors down. A supermarket should be directly in the street of the apartment, it was being renovated while we were there. We found however, that grocery shopping and sightseeing can be combined easily with a bigger supermarket being on the way from Castell Nouvo to the apartment.
So all in all a great location, a comfy bed but DO check first if the mold issue has been rectified!