Positive : localisation is great (around 10mn by walk for the duomo and the ponte vecchio and 5mn by walk for the pallazo vecchio). Guido was really accessible and reactive to answer our questions.
Negative : the street is noisy, people screaming very late during the weekend and "trucks" early in the morning. Use ears bouchon ;)
We didn't stay that much at the appartement but it's fonctional and has everything we needed.
Thank you again Guido, we had a lovely trip :)