I'm planning to purchase tickets to Uffizi and Accademia in advance via their official website, http://www.firenzemusei.it/, but in my shopping cart, it says pick up [tickets] on site. Does that mean that I would have to still wait in line to exchange my online ticket voucher for actual tickets at these museums or is there another place for people that purchase tickets in advance? I did have to enter a specific time for the Uffizi, but I don't want to miss my time because I had to wait in line to pick up my tickets.
Also, is it worth it to purchase the combo ticket to Uffizi, Pitti Palace and Boboli gardens? We are in Florence for 2 nights, getting in about noon but leaving early the 3rd day.