I book a trip to Budapest, Vienna, and Salzburg though this tour operator and was beyond pleased with my experience!
Thursday:
I left at about 4pm, and after a bus and 2 trains, made it to Florence by 8pm and we were off to Hungary by 9pm!
After bathing/swimming, I joined a few people from the tour, and we got dinner at a restaurant near the hostel.
After our walking tour, my roommate and I had a picnic in the Burggarten Garden!