I really loved the place. it feels very spacious (unlike other apartements in Sicily) and has tons of amenities that go well beyond what I would have expected, e.g. a top-tier coffee machine, fully equipped kitchen with some basic supplies, a medikit, storage space, socket adapters, fast internet connection, high-quality TV, washer, clothing iron, mosquito nets, etc. which shows that the host made an effort to equip the place with stuff that visitors could need.
Location is top, basically in the centre of the city. Right next to the fountain di elefanti, 3 mins to central bus station, directly above a small market, tons of good restaurants in the area. But note that this also means that it can be somewhat loud at times. This is the centre of a city in Italy after all, not some remote mountain retreat.
The descriptions for check in and how to reach the place were very detailed and easy to follow. While I did not meet the host, the check-in went smoothlessly and Marco was readily available to answer my questions and offered some advice for our stay in Catania.