Fantastic. Everything you want from a place in the historic center of Florence.
The apartment is beautiful, clean, and has all the amenities and some good views too.
The owner is a great host, super-easy check-in and fast replies. Lots of personal touches (e.g. recommended a great restaurant nearby that became our favourite), all the amenities you could ask for and more.
And finally, the location is perfect - right in the historic old city, all the popular sites are a short walk.