Roberto is a good host, very helpful and nice person. I absolutely recommend him.
The apartment is in good standard, cozy and have a beautiful panorama. It's not in the center but 15-20 minutes walk (there's two buses but going very rarely) and 20-30 minutes by metro (funiculare and LI or L2) you can go to anywhere.
The apartment is clear but only with basic equipment: we needed to buy toiletpaper, soap (we got these for the first day from Roberto) and dishwashing liquid.