We stayed at Hotel Emma for 3 nights. It is a little bit of a hike from Firenze Santa Maria Novella station, but is 10-15 minutes walk from Firenze Campo Di Marte or there is a bus stop right outside. However, without luggage, it's a nice 15 minute walk to Piazza San Marco, and no need to bus. The hotel is located on the second level and there is a clear sign. There is a great pizza and pasta place opposite that is cheap just 1 minute walk down the road, just ask at reception. Overall, very clean and comfortable, and decent location for those who happy to take a short walk.
Pros: Very clean, decent location for those who are able/willing to walk to the city centre or take the train/bus, very good value
Cons: If you are taking the bus, clarify with the hotel what number and stop. Trains to Firenze Campo di Marte are every hour or so, make sure you check at Firenze Santa Maria Novella. Room is a little on the small side - but still very comfortable