Marina was great and the apartment was wonderful. It was extremely clean, about a 5-8 minute walk from the train station and walking distance to pretty much everything in Florence.
The pictures don't really do it justice; it's pretty and modern and I really appreciated that it has 3 full baths.
The apartment is right above a Hertz rent a car and there is usually a line of tourists waiting so it's fairly easy to find. About a block away was a great little coffee shop and bakery that we had espresso in every morning. It's all white, you can't miss it.
The Westin is also close by and the roof has an amazing view.
I would 100% recommend staying here!