If you want to be in middle of it all, this is the place for you. It is about 10 minutes walking to everything, and also the perfect location to drop off your stuff/refresh before heading out again or across the Ponte Vecchio to the other side of the Arno River. It's a 30 second walk from the famous Cattedrale di Santa Maria del Fiore, which is not only convenient if you want to get a early start on your day, but also if you are a dingus like me and forget to book/print tickets online before arriving (oops). The apartment is also located on the same main street as the Ponte Vecchio so crossing the river to see the Boboli Gardens/Piazzale Michelangelo/Pitti Palace/Gelateria La Carraia is so convenient.
As for the apartment itself, it is airy, beautiful, and comfortable. Ithas AC (very nice after long hot days). Mimma left us very sweet gifts (literally, fruit, chocolate, drinks, water, snacks) and plenty of local recommendations. I found the resources very useful. The bed was comfy and the spa shower head was awesome after a long day of walking and sweating. it is about a 10minute walk from the train station and check in/out were a breeze. The only word of caution is that since you are SO close to the Cattedrale di Santa Maria del Fiore, they ring the church bells at 7am and you will hear it. For us, that didn't matter because we were already waking up and starting our day but if you want to sleep in, bring ear plugs (but in all honesty, there is so much to see/do/eat that sleeping in was the last thing on my mind).
We had the best time in Florence (too short) and felt that this apartment gave us the perfect launching pad for our days. I wish we had more time but I will be back and hopefully, this apartment will be available.