We (couple, mid twenties) stayed at Marco's apartment for four days and really enjoyed our stay! Marco welcomed us very cordially upon arrival (in Italian, although he did his best to speak some English too) and recommended places to go in and around Lecce, which was very helpful.
The apartment is located in a side street from Lecces main street in the historical city center, which makes the location quiet but very central. There is a convenience store right next door, but we preferred to go to the big Conrad supermarket about 15 minutes walking from the apartment. We also got our morning bread there, because unfortunately there does not seem to be a bakery nearby.
The apartment is indeed an attic above Marco's apartment, which means you'll need to climb two steep staircases. The apartment has a very spacious and very nice roof terrace: although a roof-like construction provides some limited shade, we enjoyed the terrace most during the evenings. The apartment itself is comfortable (thanks to the air-conditioning) but rather basically equipped. For instance, at the time of writing the kitchen features only the most basic amenities (pans, coffee maker, stove), with other equipment lacking (e.g. lids to the pans, cutting boards, kitchen knives, cleaning cloths, ...). Also, the lack of a couch or proper table makes exploring the city a more attractive option than staying in for a day.
All in all, we enjoyed our stay in Marco's apartment and would recommend it to those who want to spend most of their time outside - in the cityduring the day and on the lovely roof terrace during the evening.