I would highly recommend Mimma's place. It is spacious, clean and very pleasant. The bed and sofa are very comfortable and the shower is great. It is in a very central location - walk to shops, restaurants and train. Mimma is great about communicating details about your stay and any questions you have or information you need while there and is quick to provide answers to all of your questions. She also adds some nice touches to make your stay even more pleasant. Perfect place to stay in Florence!