First of all, the location was great (PERFECT) and felt very safe. I wandered out in the evenings, and had no hesitation being alone. Sabrina was very good at communication.
The floors were a little dirty, but that's the price of being in the city. Everything else was clean. The internet worked great, as well as the A/C. There are a lot of steps, 68 of them, but they are a good way to work off the yummy gelato you should eat every day!
A couple of things to keep in mind:
When it says "coffee maker", it only means a 1-cup Italian percolator-style. There were filters for a regular coffee maker, but apparently it broke at some point and was not replaced. There was no coffee provided, so make sure you pick some up before you go to bed that first night.
There are 17 plates, but no bowls! Not sure how that happened, but be aware of it.
The place could also use some basic amenities for travelers, like salt, olive oil, etc. We bought some and left it there.
The 2-bed bedroom is LOUD. There is constant noise from the street, and not just people and the normal traffic noise, but very loud traffic. Just be aware, you will only have quiet in there from about 1:00 AM to about 5:30 AM. You cannot sleep with the window open without ear plugs. On the plus side, the window is very noise canceling, so it is nice and quiet when the window in there is closed. The other bedroom is just fine, just normal street noise.
The beds are very firm.
The washer is great, but it is a washer/dryer combo, which (no fault of the owner) aren't very good for drying. However, there is a nice sized clothes rack for drying, as well as outdoor lines that you can reach from the windows, so it all works out just fine.
Sorry for the long review, but I wanted to be thorough. All in all, I'd definitely recommend this place, and hope you have a wonderful stay in the amazing city of Florence!