A very good host. Toni is quick to respond if you have any problems and he is very informative if have any plans for a day-trip.
The apartment is very close to the main attractions in the city. Everything can be reached by foot.
A little notification to keep in mind is that the apartment is quite hard to warm up, but that shouldn't be a problem for most of the year. We visited Catania in March and we had two evenings that was quite cold, which also reflected on the indoor temp.
Other than that we have no complaines and we would gladly recommend Toni as a host.
Casper and Joy, Denmark