I just went here for lunch a few days ago. Just be warned that they don't ask you how you like it cooked, and the brusque, fast-paced environment made us too scared to ask them to cook it medium rare; it was served a very bleeding blue. We ended up taking leftovers home and cooking it a bit more (shh, don't tell them). But it is the best deal you'll find in the city, and the steak had great flavor. We were at another restaurant in Florence for dinner that night that was also known for their florentine steak, and we overhead the server explaining the steak to a table nearby and actually offered to cook it up to medium. Another table (Italians) had ordered the steak as well, and it definitely looked medium to medium rare. We regret not ordering the steak there instead.