Overall, we were able to maximize and get full use out of our Firenze Card, but I have experienced better in other cities. Problems we had included unable to get onto the Wi Fi in advertised hot spots, were told we had to pay to access the Medici Chapels even though it is clearly listed in the guidebook, and we're not told that Firenze Card tickets to the Duomo expire after 3 days, not 6 as listed on the tickets.
In certain locations, it is clearly shown where Firenze Card holders can enter with priority access - such as no questions asked at the Palazzo Pitti and Uffizi Gallery. We still waited in quite a line at the Accademia Gallery, but nothing compared to the general public.
It would also be nice to be given bus route maps with your passes. As I've found in Italy, they do not do the greatest job of explaining how things work. You're left to figure it out on your own and mind read a lot of the time. With advance planning, you can definitely take full advantage and save a lot of time and money visiting the sites in Florence. I've just experienced more organized cards in places like Paris where you don't have to go to get tickets to attractions in one line, you're just granted access with your pass. read more