My wife and I stayed in this apartment for 4 nights.
Manuela was super friendly, helpful and did respond very quickly all the time. She had great tips what to do and where to eat in Catania.
The apartment itself is very modern, nice and clean, especially when you consider that 99% of the city looks very old, ruined and not very well maintained.
The location is about 20min walking distance to the main streets, shops and restaurants. Of course, not a problem, but also not right in the city center.
Overall, if you want to visit Catania or the surrounding areas (like Etna or Taormina), I'd highly recommend to stay in this place.
One last thought: You should only visit Catania by car when you're an experienced driver. Traffic, the streets and the parking situation can be very challenging and a bit stressful (I drove in more than 20 countries and this city was one of the worst).