We absolutely loved Cosmea and would love to return. The apartment is beautifully decorated and brilliantly situated - everything a short walk yet the street itself is so quiet and the felt safe. Where else can you nip in to a supermarket after a day of sightseeing, pop home for a bowl of fresh pasta overlooking the city and then take a five minute stroll to hear opera duets in an exquisite church? Nearby are lots of good eating places too but we loved the roof terrace so much we opted to stay in 2 out of 3 nights and the kitchen is ample for simple meals.
The climb up the stairs is the price paid for stunning views and they really weren't too bad. I am a deeply unfit 49 year old and maybe I puffed a bit but I didn't mind because the whole place was worth it.
We parked near the airport at Garage Aldo, and got a taxi in (€25) which was cheaper than parking at the nearby garages and saved the stress of driving in the busy part of the city.
We were met by Amerigo who was very friendly and helpful and Diana in the office was easy to contact. She speaks particularly good English so the whole experience was very simple.
For a couple we both feel this is THE place to stay in Florence.