We spent 6 nights at the Santa Trinita Industrial Flat in late Sept/early Oct. The property met all of our needs with the layout - sitting area, small kitchen w/adjacent dining table, spacious bedroom and bathroom. The location was great and just steps from the shopping on Tournabuoni and within a 5 min walk of Piazza della Signoria.
A few items that should be noted about this location include: the narrow, 40 step stairway to the apartment, challenging if you're not in great physical shape or have large bags (not an issue for us); the lack of any instructions inside the apartment for the lights (one of those European-style card systems), the stovetop or oven; the lack of window screens that negated the appeal of the cross-breeze with very hungry Florentine mosquitos.
More about the mosquito infestation - after checking in, we opened the windows and after some sightseeing and dining, we came home to sleep. My husband awoke in the morning with more than 25 mosquito bites over his head and upper torso. After a 2nd painful night (even with the windows closed and the A/C on despite the cool outside temps), we contacted the owner who said they would provide insect repellent. When we returned, we found a "plug-in" device (new to us) and it turned out we had one in the apartment already. However, without any tips/warnings about mosquitos, we didn't know what it was for. The speed with which it was provided indicated this had been a problem before.