As for Manuela, she is without doubt a really nice person. She was caring about our comfort and constantly asking whether everything is ok during the whole stay. A big positive is her tendency to instantaneously respond to messages. Although she is not completely fluent in English while speaking, she can understand a conversation and also her written English is good, so generally, the whole communication went smoothly.
As for the apartment, it is located in a side alley nearby the main street close to the city centre. It is basically equipped, but you will find everything you need in there. It is also clean, so no need to worry about that. Plus, it has a nice small terrace outside. The only issue were the neighbours which were truly loud during the nights. Even though Manuela tried to solve the problem really hard, it persisted during our whole stay.
To sum it up, if you are not expecting any luxury, and are not hesitating to experience in my opinion regular living in Catania (including a noise during the night), considering the price, this apartment is a bargain.