We loved this apartment!
We are family of 4 (2 kids aged 10 and 12) and it was perfect. Plenty of space, clean, fully equipped (nice to have a GOOD tv for the kids with a USB slot too so they could bring films) and comfy sofas where we could actually relax rather than just a sofa there for the sake of it.
We loved the split level and the beds were very comfy. Air conditioning on both levels was a bonus and we never felt uncomfortable with the heat (considering it was 34+ outside).
The kitchen was separate from the living area which was great, with a dining table and great cooker with all the pans/utensils you'd need and microwave too (although we never used it) and Lapo provided coffee for the moka pot and spices/oils for cooking. We didn't need to get anything other than the food we wanted to cook.
Bathroom was very clean with fresh towels and even had a washing machine and tumble drier. Again, everything provided.
The apartment felt very secure with 2 strong doors (small hallway/entrance after first door) and although on the top floor (3rd floor) with no lift, it wasn't a big deal for us. Because the apartment windows were at the back, it was very quiet but the road where the entrance door was, wasn't that noisy anyway even with restaurants/shops.
The location was just the best. VERY central but quiet and felt safe (like most of Florence really). A few minutes walk to the Ponte Vecchio/Arno and the main shops/shopping streets.
Lapo was a great host. He was there to meet us, talked us through how to lock up and work things and was on hand whenever we had questions. He replied almost immediately.
We would definitely stay here again. A great find!