We had a lovely stay at Cristina's flat in Florence. The apartment itself was spacious and very nicely decorated, and had plenty of space for our 10-month old to crawl around and explore. The kitchen was especially nice and well-equipped -- we were able to make lots of wonderful meals there with food from Mercato Centrale. While there were some rainy days, we still made use of the terrace, which was a great place to enjoy lunch at home.
The apartment is in a really good location -- it's about 15 - 20 minutes walking (with a stroller/buggy or baby carrier) to most major attractions and the town centre, and is in a nice part of town that feels like it's not too touristy. There were lots of great bakeries nearby that Cristina pointed us towards that we thoroughly enjoyed.