This apartment is drop-dead gorgeous and well located!
We felt as though we had entered the presidential suite in a 5 star hotel upon arriving. There is great attention given to everything: wonderful furniture, a beautiful bathroom, a terrific kitchen, and it was all incredibly clean. The apartment is also quite large, and receives terrific daylight. We did not take a single cab or bus during our four day stay in Florence, and were able to see everything (30 sites)... The apartment is on a "busy street", which thanks to Florence's driving laws, means that there is little traffic except when people are going or coming from work. Noise was never a problem - and the street always felt safe.
As an aside, definitely get the Firenze Card if you are in Florence to see a few things. Just saving the time waiting in line is worth it.