The apartment is extremely well-located and we were able to get around Florence just on foot. There is everything at a walking distance, and the neighborhood felt safe for walking at night. Though we felt there were some slight issues with the apartment, we still had a great time at Giulio's place. Additionally, he was very quick in replying and gave us flexibility for checking out.
These are the few things we highlight to consider inside the apartment:
1) The apartment is distributed on two levels, and there is a bathroom and a bedroom on the lower floor. However, there are no windows on this lower floor, and this can make it a bit stuffy. Also, it was difficult to take a shower in the lower floor bathroom without getting the entire bathroom floor wet; so we ended up taking showers upstairs only.
2) Note also that there isn't a living room -- the sofa is inside the lower floor bedroom.
3) Lastly, there was somewhat of a mildew smell in the apartment, but this may be the case for most places in Florence.