The stay at Alessandra's flat was nice. The zone is amazingly situated near to every single attraction of Florence. It's a little city, but still, you can see all the major interesting points by walking.
Also, is relatively near of the train station, where you can find a lot of car rental companies, in case you want to visit some places nearby. We did it, we went to Pisa, San Gimignano, Siena... it's a great plan for one or two days.
The flat was perfect for 3 people. Due to a problem of two friends who were at Florence at the time, we were 5 on it. Ale didn't had any problem and was very helpful. We were tight, but still, it solved us the problem, so nothing to say!
It's clean and confortable.
We had a little problem with the air conditioner, but the last couple of days was solved.
Alessandra itself was very helpful, worried about all the problems we could have, and finding the solution to them. She recommended us places to see, where to eat, and things to do.
Overall, a great stay.