The apartment, although small is very well designed that you have plenty of space to move around. Also there is plenty of storage area. Although I haven't met Stella personally, her daughter Gaia waited for us and provided us with the keys and showed us the apartment. I have maintained communication with Gaia afterwards. She and her father were very helpful when we had some issues with the washing machine. They came that same day and fixed the issue. Thank you so much for making us feel at home during our long stay in Florence.
Needless to say the location of this apartment is great, few steps away from Ponte Vecchio and 10 minutes or so of walking till the Duomo.

Florence tip #1: Galleria dell'Academia is much overrated in my view. If you travel until Sep 2015, go see the Dali meets Dante temporary exhibition in the Medici Palazzo. Astonishing!
Florence tip #2: Gelatto: Vivoli and another one on one corner of the Signoria Plazza (discovered it on my last evening and forgot to take note of their name).
Tuscany tip #1: Do not book a Tuscany tour of one day. It will only get you tired and frustrated that you couldn't breath in all the beautiful landscapes. Do go visit Siena (the cathedral is the most beautiful I've seen in Italy so far, beats San Pietro Basilica and others) and San Gimignano. Best gelatto in the world can be found in San Gimignano main city square: Dondoli Gellato.
General Italy tip: Do not visit during the hot summer months.