We did not met Guido, but he was very helpful and quick to answer. We get the keys from the nice neighbour Mr Lombardi. Appartment (3rd floor) is very nice, with confortable bed and equiped kitchen. Perfect location in the heart of Florence, few meters from main interest points ! One major issue for us : very noisy at night (people partying + cars + workers in the morning), we had real problems to sleep on the first night. With earplugs, i would give a 5 stars