Beautiful apartment exactly as shown on the listings, which slept 6 in comfort and could have accommodated 1 more on the sofa bed on the ground floor of the largest bedroom. It really was very special and perfectly located for sightseeing as it's right in the centre of the tourist area. The apartment is 12 minutes' walk from the main train station in Florence, which connects to Pisa in a 1 hour train journey at 9 euros per adult and 6 euros per child. Maria, who checked us in, gave great recommendations of places to go and really was excellent. On the downside, make sure you have money ready because you will be charged tourist tax on arrival of 2.50 euros per person (age 13+) per night of your stay. If you check in after 8pm there is another 20 euro surcharge, and even more if you're there after 8.30 etc.
We took our four kids, who really enjoyed the mezzanines (which might be hazardous for kids 6 and under, though Lucca had thoughtfully supplied a cot and a high chair, which I thought was a nice touch). The air conditioning was superb (it was close to 40C in Florence during our mid-August stay). WiFi only worked in the living/dining room so if you're taking kids of a certain age, expect to find them clustered in this area. The TV area had plenty of comfortable seating and the dining area was perfect.
One annoyance was that every time we used the oven we had to go down to the ground floor (the apartment is on the 3rd floor) to re-set the fuse box between 6-10 times per pizza. We were told this is fairly typical in Florence. There was no dishwasher - which meant we were constantly washing up, but given the fuse box situation, I'm not sure a dishwasher would have worked anyway. A hairdryer was supplied, but I didn't dare to use it.