We came to the apartment as part of a family trip with small baby. The apartment is very central, 3 minutes from the Uffizi and around 20 from the train station, very convenient for us cause we needed to walk with stroller and luggage everywhere. The walk from the apartment to the train station is stunning, especially if you deviate east a bit and get to Santa Maria del Fiore, you won't regret the view.
It is also 1 minute walk from the Arno river, where you can get a good look at Ponte Vecchio. Again, you cannot miss that!
Sid was very prompt in communicating with us when needed, he was always ready to help us. For instance we faced a bit of a problem with one of the kitchen sink pipes, that had to be fixed. Sid sent a person right away to fix the issue - it turned out we avoided half of a disaster by not using the dishwasher. Additionally, we had to stay home and wait for the pipes to be fixed and then we had to clean a bit after the fixing was done. It was the only inconvenience of the whole period...I have to say that the apartment felt a bit old, this was evident from the dust left on the furniture.
Noise-wise, it is non-zero because of the central location, especially on Friday and Saturday night, but we new that beforehand and all of us (baby included) managed to sleep well.
All in all I still recommended it to anyone willing to spend a bit more but be very close to everything.