We, two couples, spent two nights in Luca's apartment and had a very good time. The apartment is large, cozy and comfortable, with all the neccessary equipment. Everything was very proper and well maintained. Even more impressive was the style; nice furniture, nice decoration, not too much.
Since it was very hot in Firenze, we needed the airconditioning. One hint for improvement: the airconditioner in the bedroom to the street was leaking (water dripped on the floor). We turned it off, but with the door open to the living room good sleep was possible.
The location of the apartment was perfect for us, because on our hiking route to Siena and Montepulciano we started at the bus station, just around the corner.