Quick and efficient. They do promote insurance, but if you say no, they respect your choice without any hassle. There's no need to stick to rental companies inside the airport terminal, as this limits your options. Many rental companies are just a few minutes' walk from the airport, so you can choose those with better reviews and a wider range of vehicles.

Service was satisfactory and standard.

Very good, but Italians have a bit of a language barrier with English.

Not far from the train station, a bit hard to find, but most rental companies are nearby.

Sicily by Car was forcing me to buy additional insurance after I repeatedly told them that I already had purchased extended insurance. The attendant then informed me that I had to put an $800 hold on my car. At that point I decided to walk away and not rent the car with them. This ruined my plans to visit Tuscan wineries. Never again!