This place is a gem! My husband and I stayed here for four nights on our vacation. It is located on a quiet street but is central to all the main sights--you can walk to almost everything in 10-15 minutes. 5 minutes from the train station, 3 minutes from the bus station, and only about 12 minutes from sights like the Duomo and Uffizi.
The apartment was spotless and spacious compared to other European apartments I've been in, though the bathroom and shower were a bit tight for my 6'2" husband, haha! More of a laugh than anything else. The bed was comfortable and the apartment had all the amenities you would need, including a welcome basket of snacks and wine/beer/water. Barbara was very prompt in responding to communications and her father met us at the train station and helped us with our luggage, explaining where everything was in the apartment in Italian pantomime. Please be advised that this apartment is located up several very steep sets of stairs. This wasn't a huge issue for us but could be challenging for anyone with mobility issues. All in all, we were very happy with our choice and would recommend this place in a heartbeat!