A beautiful very comfortable high ceilinged apartment in the centre of Florence but only 5 minutes walk from the railway station and looking out onto the Medici Chapel - just as described. Very well equipped and very nicely furnished. Cosimo's mother, Alberta, who greeted us lives very close by. Cosimo was excellent at answering queries and very helpful about an early check-in.
The flat has ceiling fans rather than airconditioning but we found that these worked very well and kept the flat pleasant. We were there in late May during a particularly hot spell. The flat is on the second floor of a secure old building tucked into a corner of the square and there is a lift. It is very secure. The flat itself has three steps up between the entry/bedroom level and the lounge/bathroom level.
The location is great with all the tourist attractions on the doorstep but without feeling "mobbed". The windows had very good sound insulation qualities and when closed cut out all the normal hustle and bustle of the city. Yes there was clearing up noise from the restaurants in the square below before midnight and from the garbage trucks earlier than that and then around 7 in the morning but it did not bother us.
We found it an excellent location for "doing" Florence - a great place to come back to and have some peace and calm after pounding the streets! We have no hesitation in recommending it.