We didn't have the chance to meet Carolina, but her mother was very kind and welcoming throughout our stay. The accommodation was wonderful, although we had to share bathroom with the other room, there were 2 available and it was always clean. The location was fantastic! About a 10min walk from Santa Maria Novella train station and from the accommodation you could walk to anywhere in Florence. One tiny problem we had was that the street outside (although it was a small street) was quite noisy sometimes, so I recommend bringing earplugs with you. Also, the house is on the top floor and there is no elevator so be prepared to climb 5 flights of stairs, good exercise though!