We had a really nice stay in Guido's apartment. The best feature of it is the location. Right in the middle of the centre. But the rooms are nice too, and the airconditioning might be useful in the summer (we didn't have to really use it). The only disadvantage of the apartment is that it can get a bit noisy during the nights. But a set of ear plugs will solve this. Further, I could say that the wifi might be a bit unstable and that you cannot watch tv (unless you prefer 2 italian channels).. but hey, you are in florence so go and explore the city! Thanks Guido!