I have read several posts about the Firenze card, and most of them seem to devolve into a discussion about whether is worth it compared to making reservations. The cost was not important to us, but saving time was. Here was our experience.
- We bought the card in Florence at the TI across from the train station. We got there about 9:00 am and it took about an hour. The couple we traveled with bought theirs online and it took them the same amount of time to exchange their voucher for the actual card. We, however, paid 85 euro each, while theirs were 72, including the public transportation option.
- At the Accademia, about 10:00, we waited about 10 minutes in the reserved line. The line for buying tickets was endless, and the employees informed us that the tickets would not be for that day. My partner remarked, "If we don't get anything else from the card, this was worth it."
- In the afternoon, we wanted to try the Duomo, hitting 2 of the big four on each of the two days we had for museums. As Rick mentioned, to visit the Duomo sites, you have to show your card first to get real tickets. There were only about 10 people in the line to do this, but it took over an hour and a half. The line to get your tickets is the same line to buy the Firenze Card. There were three windows open for people to buy tickets, and only one for Firenze Card holders. It would have been a big time savings just to purchase the Duomo tickets directly. By the time we got these exchanged, it was time to walk back for dinner, so we decided to do it first thing on Friday.
- We got to the Duomo first thing. The line to go into the Bapistry or climb the Belltower was a little more than 45 minutes each (according to the employee there). The line to get into the church stretched entirely around the Duomo. You can't visit the Crypt even with the ticket, without waiting in this line. However, there is no line for the Duomo museum, which is where all of the good stuff actually is. (By the way, when we were there (August 10, Dome clime reservations could only be made for the week after). The Duomo museum is air-conditioned. The Accadamia may be, but my wife swore it was not.
- After the Duomo museum we visited the Bargello to see the Donatello Davids. No line (either to buy tickets or to get in). No air-conditioning, so a little hot.
- It was now 11:30 so before lunch we wanted to go to the Uffizi. We were directed to the reserved sign and told that the wait was about an hour and a half. So, that's the one we ended skipping. I don't know if you would be able to immediately get in if you had a reservation for a particular time, but that seems more likely.
In hindsight, assuming the situation is the same, I would get up at 7:30 and just buy tickets for the David (as one of our party did). For the Duomo and Bargello, it seemed like there were no ticket lines (or, in the case the Duomo, shorter lines if you didn't have a Firenze card), so I would just buy them there. Then, I would sign up for a guided tour of the Uffizi.