My girlfriend and I had a very pleasant stay in Florence in the apartment of Samuele & Lavinia. Everything was very well organized, they always responded very quickly to our questions/messages and were also very flexible regarding the arrival and departure. Would definitely go back there again; the only thing to criticize might be the size of the bathroom but that's something you can definitely get over with if you just stay for a few nights or if you're just 1 person/a couple.