Our stay in this apartment made us feel like we were living in renaissance Florence. The apartment itself is pretty incredible. Living room ceiling is painted like the ceiling of the Uffizi or a comparable gallery. On the whole, it felt like a miniature palace. Beds are comfortable; A/C in every room is welcome. Kitchen is good enough for a family or group for a short stay.
Location is prime. Feels like you're a three-block walk from everything. Short walk to the Ponte Vecchio; two blocks from the Palazzo Vecchio and Uffizi (and a super-yummy sandwich shop called Dal Vinaio); three or four blocks from the Duomo; across the river from Boboli Gardens; in the middle of the main shopping district. Could not ask for a better location if you want to live in and experience the heart of Florence.
Only word of caution: There is an open-air market across the street from the apartment. Vendors begin to set up their shops early in the AM (around 5:30 - 6:00 am), which can be a bit noisy (typical, middle of the city early morning noises); then in the evening, the market serves as a location where buskers do nightly performances, which regularly went until 11 pm (and one night went way too late, with an absolutely awful male soprano performing opera until 12:45 am). In general, the performances are good (and the apartment's windows muffle the sound well enough), but if you're a light sleeper it's something to consider.