We stayed nearly a month at Massimo's apartment in Florence. Massimo was waiting for us on the sidewalk when we pulled up and very kindly helped us up the three (plus) flights with the large amount of luggage we had brought. The steps are fairly well lit and are not difficult to negotiate.
Massimo had fresh strawberries along with some juice and sweets out for us. We also availed ourselves of the dried pasta and tomatoes and the oil and balsamic vinegar for some homemade meals. The microwave was handy for heating take away from the nearby restaurant.
The apartment is very charming and the outdoor space has a wonderful feel The private area has a table and three chairs and the shared space, which we had pretty much to ourselves, is very lovely.
You need to take Massimo seriously about his wifi internet access. I was unable to use FaceBook with my iOS device (my husband was able to use FaceBook with his laptop, go figure). E-mail was usable.
We found the bed to be very comfortable and plenty wide. Towards the end of our stay it was beginning to get warm in Florence and we found the air conditioners to be quick and plenty powerful.
The bathroom is configured in a somewhat awkward way. The shower closet is small but we found it workable (a large person would NOT fit). We always had plenty of hot water and good water pressure. The toilet, however, is so close to the shower cabinet that you could only sit on it sideways (and I am less than 5 feet, 5 inches or 165 cm tall)! We used the washing machine multiple times along with the drying rack.
At our request, Massimo had his cleaning people come during our stay (€15). The location was great for us -- you are a short walk to the most touristy area of Florence and the immediate neighborhood is great. We felt very safe, enjoyed the very close proximity to multiple parks, and easy access to a grocery store and many eating establishments.
In all, The Nest is wonderful for a short stay.