I have stayed in Florence apartments many times and find the apartment experience to be far superior to a hotel stay. Belvedere Duomo has all of the comforts of home : a beautiful kitchen, great amenities, a washer and dryer, and an incomparable location. This apartment would cost 5 times as much in a fine hotel - so I consider it a real bargain.
The apartment was spotless, the beds incredibly comfortable and the onsite manager Paolo was a true treasure. He set up tours for us, a cooking class in the apartment! (We went with the chef to buy the food in the mercato centrale) .
I will be back to Belvedere Duomo as often as I can! This should be on everyone's bucket list!