I stayed at Horia's with my sister and 10 year old niece - we all had a fabulous trip to Florence and agreed that we'd highly recommend Horia's apartment.
Location-wise, the apartment is perfect for exploring the older part of town (the Uffizi, the Medici palaces) and it is in comfortable walking distance from Santa Maria Novello station. The local church also houses the final resting place of Galileo and Machiavelli! There are a variety of eateries and local shops to the apartment, so stocking up on supplies was also easy.
The apartment itself was delightful and immaculately clean - the sheets and towels looked and felt as if they were brand new. The shutter/curtain combination created a wonderful black-out, although I had to remember to turn on my alarm clock the second morning!
The kitchen was equipped with everything we needed (no oven, but a washing machine), and the bathroom was pleasantly quirky. We also really appreciated the gift of a local bottle of wine on our arrival.
As a host, Horia is very friendly and brilliant at communicating both before and during our stay.
If the opportunity arises, I would not hesitate to stay here again.