As others have mentioned Lorenzo is very helpful during check in and out by carrying bags and arranging taxi's. We also had a request for reputable leather shops that he was able to quickly get us some recommendations to visit. He is extremely helpful and will answer questions very quickly. The view from the patio is spectacular and it is a great location in Florence.
The downside to this apartment is that it's just not as clean as other apartments we recently stayed at during our recent trip to Italy. There were areas that the flooring had gotten wet and were starting to crumble, we saw a few spiders in the bathroom and there was quite a bit of dust on the trim boards in the bedroom (the bed is on the floor, so it's more noticeable). Due to the low ceilings in the bedroom, the bed has to lie on the floor and we didn't feel it was very comfortable.
Ultimately if you want one of the best views of Florence, this can't be beat, but we felt that in order to be considered an excellent stay, it needed to be much cleaner.