You don't need to use ANY booking service to make Uffizzi reservations. Avoid the queue with a short phone call:

Call 011-39-055-294883 Italian time 8:30 to 18:30 Monday to Friday. They speak English. This is the official reservation line of Florence Museums. You'll get a confirmation number and pay for your ticket and reservation fee (about 1.50 USD) at the museum.

Thanks to Patti (in Italy) for this tip.

Cheers! Don and Linda