We stayed for 3 nights and when contacting Barbara before our trip she was very pleasant. Her house manual is also very thorough and with good recommendations. If you only want a spacious place that is central, this is for you.
The place itself has limited amenities, we had to buy our own hand soap and toilet paper. The bathroom had seen better days; the water runs cold, the tub worn down, and shower head doesn't stay in place. Also, the leaky bathroom sink which we asked about was never fixed during our stay, so we had to use the kitchen sink for that purpose.
The bed and pillows, both were very comfortable. Even so, we didn't get good rest because of passersby late at night or construction folks in the morning.
Overall, we would spend a little more to get a better place the next time we are in Florence.