Elly's apartment was such a charming spot for my fiancé and I to stay for three nights in Florence. Elly was amazingly helpful and communicative, which made our stay lovely. She provided us with an expansive map of places to eat, visit, and shop. Even for someone who lived in Florence for four months years ago, I found it very insightful!
The bathroom in the apartment is just as explained: the shower is in between the toilet and sink, and is about 2ft x 2ft. So, it's tight but wasn't a problem for us. She provided an excellent assortment of kitchen tools that allowed us to cook dinner for ourselves one night. The apartment is steps away from the Mercado Centrale, so it was easy to wake up, get things to cook, and make them the next night. And the balcony is so wonderful!
To get to the apartment, you must climb five flights of stairs. It would be quite a haul if you have heavy/a lot of luggage. But the location is perfect and quiet at night.
If you're staying in Florence and want to be in the heart of the city, I'd recommend you look nowhere else!