This is a great place for Catania:
1) from Airport by public transport: the airport bus will drop you within less than 10 minute walk, although you will need GPS to find the place at night. It is really simple if you have a map: follow Plebiscite Road (with many food shops).
2) with a car: the parking is tight but feasible, you may have to walk around a block.
3) very central by foot.
The flat was very clean and recently decorated.
Giuseppe and Maria welcomed us and pointed us to the shops (even though it was late) and were very responsive.
It may be noisy (car cleaning across the road was closed for holidays when we were there), but this is Catania and part of the experience!