I highly recommend staying here! It's a third floor walk-up, with an elevator. The neighborhood is south of the Arno, which offers welcome relief from the hordes of tourists while being close enough to still be a tourist yourself. Great food options are nearby: quality genuine gelato, neighborhood apertivo, breakfast cafe, sit-down restaurants, all less than two blocks away.
The layout of the apartment is great, kitchen is top notch (not that I was doing any cooking while in Italy!). The three bedrooms are well spaced and there's a great common room for gathering.
The only item of note is that it was mentioned that the heat pumps were broken. This might have been a mistranslation, as our visit was in November and the main heating system was working fine. But I would confirm that the air conditioning is operational for any summer trip