Very nice and clean apartment in a relatively quiet neighborhood (no car noises or anything, you can however hear your neighbor's every toilet flush and the occasional train passing by - the train tracks are around the corner). Not too big of a deal though, we were sill able to sleep fairly tight every night. ;) It's only 5 minutes to the metro (which takes you to the city centre very quickly. Also not too far if you go there by bike as we often did). Some shops and restaurants are just around the corner too.
We didn't have much contact with Claudio - when we did text him though, he answered very quickly and was always super nice and helpful. Definitely a recommendable host! :)
Grazie!!