Francesco's spot is clean + charming - the pictures don't do it justice. The bedroom is spacious, there is a standing A/C unit and the kitchen is small but functional. Only downside is the size of the bathroom, which is extremely cramped, but there is an outdoor shower and laundry machine to compensate for it.
The key feature - which I don't think is super clear from the images - is a wonderful balcony view over Salina where you can see Panarea & Stromboli on a clear day. The room is extremely centrally located to Marfa's central square (where, coincidentally, the island's shuttle bus stops on the hour during summer). All in all, a very convenient location from which to explore Marfa, Pollara, Lingua, etc... Salina is magic and was a perfect home base for the two of us.