We contacted Cristina and Marco to find a place to stay for my girlfriend while she was in Florence. Let’s start saying that Cristina and Marco were awesome since the beginning, while I was in touch with them. They were super very responsive over email and helpful during the organizational process.
However, below you can read about her experience:

I stayed with Cristiana and Marco for 4 days. Lets start with the location first, it is an amazing location, literally 2 minutes away from the bus station and 3 min away from the train station, close to downtown and the river. Their place is gorgeous as well, very nicely decorated and super clean. You have all you need in the room. The restroom is very clean as well.
As for Cristiana and Marco, they are awesome! They are nice, helpful, friendly,…there are not enough adjectives to describe them :) They told me about all cool places to go eat where locals ate, so the food was better and cheap. They also prepared breakfast each morning, which was delicious. We chit chatted over the breakfast table and I learned a lot about Italians and Florentines :)
If you are a person who enjoys socializing, you will love to stay here. But if you like to have your privacy and are not interested to socialize, you still do not have to worry because they are very respective of your space in that case as well. If I ever go back to Florence again, I most definitely stay with Cristiana and Macro again! Thank you guys for the amazing time, breakfast chats, and place!