The stay at Marco's place was quite bad, I would totally not recommend his place for a nice holiday. The price was fairly good, the location is also fine with relation to how long it takes to get to the center. There were a few things that ruined our holiday.
First, the apartment is mid used-items market in a district that's a bit falling apart, which starts early morning every day - so the whole surroundings are littered with trash all the time, and I would for sure not feel safe walking around alone. For sure it's not in the old town.
Second, we couldn't sleep properly a single night due to a loud constant noise coming from the building, which would start in the evening and run throughout the whole night. We contacted the host to look into it, but after coming to the apartment and listening to it, the host couldn't help us since "the neighbours wouldn't pick up the phone". Was really a bad overall experience, especially since you want to rest during your holiday :(