I can only say the best things about our weekend at Mirko's apartment in Rome. The communication with him as a host went without any difficulties and he helped us finding ourselves perfectly in Rome. The house (which is really beautiful) is a bit away from the street so that it doesn't feel like you are in the middle of such a big city. It is really spacious and provides everything you might need, especially in the kitchen. The bed was arranged really cute so that we felt at home from the very first moment. Also the Wifi worked perfectly. If you have some time (30 min or a bit more) you can walk easily to the city centre. If not, there is public transportation just around the corner.
Also a supermarket is only 5 min away walking. You can find everything you need there. If you are searching for good restaurants or some street life in the evening, Trastevere is the place to go. Romans love to go there just as much as tourists. The good thing about Mirko's apartment is that it is in Trastevere but not in the middle of the action.
As we stayed there in November we did not use the balcony. Anyway, if you are a smoker or visit Rome during a warmer period of the year, you can spend some nice hours there - chatting and drinking wine for example. We stayed in Rome many times before and this Airbnb-experience was definitely one of the best. We would fully recommand Mirko's apartment for a trip to beautiful Rome!